Well yea isnt' it obvious?... it's working right now even when the mempool is empty because there is still a block subsidy
1. Using drivechains is optional though. People who don't trust it can completely ignore it. They never have to expose any of their funds to it and can continue using on-chain, lightning, ark, ecash, etc. Bit of irony considering the last three have a lot more trust assumptions than drivechains, but people are still okay with them.
2. You won't literally have to wait 3 months to get your coins if you don't want to. You can swap with other users on-chain or use services like Boltz that there will surely be a market for like every other coin. I think there is even a drivechain for decentralized exchanges already.
3. Honestly, I don't really have a strong opinion on this. It's kind of already shitcoinified isn't that the whole contention with BIP110 vs Core right now? At least with drivechains the incentives push people to do that off the L1. Most people already associate Bitcoin with crypto in general and use them interchangeably.
4. True
I don't think drivechains will likely happen either.
