Meme tokens are of no importance here.
Other coins had sidechains before for every hype there was from NFT to Defi to now meme tokens a lot of other useless stuff, the problem in crypto is that since ETH appeared and dethroned LTC we never had a continuous number 3 to 10 battle, in 2018 it was XRP,BCH ADA, in 2020 we had BSV, the polkadot , then BNB, then SOL, and ussulay when you go out of this you start losing places like there is no tomorrow unless you cling to something.
BNB at least has Binance, XRP has the team in control of a ton of coins and can manipulate the market at ease, the other coins are not like this, look at EOS which had billions and funding and still flopped.
If Solana doesn't manage to fix the network problems and another thing comes with the same tech then it will be far more trouble than the loss of the meme market. The team needs to learn from how ADA has failed.