There will be pros and cons when using multiple exchanges. As for the cons, maybe it's more about asset and time management. Because of course it will influence how often you use the exchange, how long you stay on the exchange and do you really do everything on the exchange?
Then specifically for risk management, actually this is more about choosing an exchange. So there are indeed some user restrictions in some areas, of course you have to use other exchanges. And this also reduces the risk when the exchange suddenly collapses.
As for the other things, I think that even though you use several exchanges, that doesn't mean you use a lot of exchanges. because it will not be effective enough. For example: I have many exchange accounts but the ones I use most officially are only 1 or 2 of them. .