Need to realize that the overall stablecoins across various L1 has been increasing significantly. Solana and SUI also sees the same stablecoins growth as well as RWA.
I'm sure you are not referring on their value as it only stays 1 dollar at most. I think they are popular even before but they only became stronger due to the recent happenings. Same goes with the other that you mentioned there.
I would only go back to investing in ETH if they can solve the L1 problem of gas fee, sometime it still spikes, ending the need of L2 once and for all.
It is said that this pectra update of them will cover it. So you gonna love this update. It is up to you if you will go back on them now to gain more benefits before others jumped in or you will verify things first if it is true or not. I still think that the spike in fees are only normal because we can't control the people that are doing a transaction. But, there should be a visible improvement when the market is in a stable condition. This is a threat to L2 but maybe they will also do their best to stay in the competition.