Good question, because surely there must be other privacy focused wallets and services under their radar, i saw a few people mentioning Wasabi in bitcointalk, i don't know if it is just speculation or if there is actually any hint at that.

It's possible Wasabi could be next, but I think they played a bit smarter game than Samourai developers.
Coinjoin is not illegal, but they can always make some bitcoin address connections with ''hackers'' and blame them for them.
Government is so very lucky to always have ''evil'' hackers from N.Korea and other countries for that purpose 

Yeah, most likely Wasabi and Sparrow are now in the cross-hair of the US government agency and maybe just gathering enough data to nail down the owners just like what they did to Samourai.

There is no real reason to touch Sparrow wallet.
They didn't directly do anything except providing different interface to Samourai wallet, and in latest version they removed all that from their code.

The next to fall? It could be another wallet, a mixer, or anything that makes them think it's used to launder money, which is really stupid. That is why it is normal that every day there are more services available only on .onion domains. It's not always about hiding something, but about being able to use it freely.

Or maybe a cryptocurrency forum? 
They like to mix things, so maybe they will take a break and move on some exchange next.
Now would be the best time to improve security and privacy for any crypto service.

Although, I won't deny that it would be a coup if you could suddenly start paying for subscriptions via Stripe using crypto.

I think I had Stripe account years ago, but I don't miss it at all.
There are plenty of payment cards that support cryptocurrency payments now, so even if Stripe someday adds support for stablecoins it would be anything revolutionary.
I am reading all the news with a big dose of reservation, until I have multiple confirmations, everyone wants only growing numbers and sensational news.

Another service focused on user privacy that is closed with the excuse of money laundering.

According to them everyone and everything will be laundering money soon, except them
I was never a supporter and regular user of Samourai wallet but I respect all the work they did for privacy.
They probably made some mistakes along the way, but we all did, and I never once thought they should be arrest for creating bitcoin wallet.
Question is what wallet and service is next on the list in their evil agenda?

That article seems to imply they plan to detect "illegal activity" on XMRT though. And yesterday they just post more detailed explanation about XMRT on https://everywherefinance.medium.com/xmrt-goals-how-it-works-9c17cca90e75.

Sure, like I said they can do whatever they want on other chains like ethereum, even if they claim they won't freeze or blacklist anything.
I am sure bridging from erc20 to monero chain and vice versa will be centralized and this is the part they can always censor.
Another thing I am concerned is how peg with monero will work and potential of totally different and manipulated XMR prices.

I really don't get why don't US government takee a closer look at the  NFT money laundry industry .

I am sure they are already tracking that and everything that is recorded on bitcoin blockchain, so they are not going to forget it.
They will never look at billions that are used for money laundry with constant wars around the world.
It's much better for them for people to argue and fight with each other while they are stealing and making privacy a bad thing.

I hope Sparrow Wallet doesn't go too far in this direction, at least for now.
It is still possible to use decentralized whirlpool, or at least forking it. I don't think arresting the developers will stop the project.

They already removed all connections with samourai and whirpool in latest version 1.9.0

Instead of arresting the real criminals and killers they are spending enormous amount of time trying to kill privacy and shutdown anything connected with that 

Worst thing is they are not going to stop with Samourai wallet, they will move to everything else soon, and they need money to fund their stupid wars around the world.

Meanwhile people are dumbed down with games, drugs, sports and stupid politics.

I like to keep a few bucks in my phone. I use now Aqua and Exodus, which I know aren't the best wallets, but they are convenient and I only hold  small amounts.

They are fine for using with small amounts when you need to send or receive payment urgently.
I know some people wanted to invent the wheel again so they used dices to generate seed words for their wallet but they generated very weak entropy, and that is worse than using PRNG.
Another fun fact is that most computers, laptops and many smartphones use software-based PRNG, so think about that