As soon as more protocols start to create defi's etc on btc , fees will increase in thousands of dollars for a single tx .
The unfortunate ones will be those that will have to exit from LN for whatever reason and those stacking sats . A new era is coming .
Sidechain is barely used while LN still require on-chain TX to open/close channel, so unfortunate ones is more likely to stop using Bitcoin or use Bitcoin only for bigger TX. And IMO things such as DeFi or NFT should be done on Bitcoin sidechain instead.
BRC-20 transaction patterns could be identified regardless of their size, so a complete "block" is technically possible,
Of course, but BRC-20 folks could simply change the protocol, or change directly to a competing token format, like Casey's proposed "Runes", or even old ones like coloured coins, Omni and Counterparty. As long as the token creator is still around, he can simply swap them for the new format (they're essentially centralized). It would simply lead to an arms race and in the end nothing would have been improved. So I strongly oppose Luke's approach, even if I won't win a popularity contest in this thread with this stance

Although even if the author change the format, all BRC-20 software need to perform update on their back-end and wallet software.