I have already proposed a solution several times -> merged-mined sidechains. This would basically be the same thing as tail emission, only that the tail emission goes on on different chains, not on the main chain.

I personally like the Drivechain model, but it's not critical for me, if a sustainable dynamic federation concept, a working ZK rollup concept or whatever is found, then I'd say ... go with it. That's also why I opened the L2 observer thread, although the current situation is still not satisfying, but there are some projects which could be described as "a start".

Judging from the fact that Ethereum dipped in the Goxcoin panic too even if ETH didn't even exist in MtGox's times, and also the German BKAcoins didn't affect Ethereum at all, the impact could even be negative for them.