We should immediately reject anything blockstream proposes due to their conflict of interest selling sidechains, a market created by throttling L1 capacity of bitcoin.
There's just so much data that can fit into a block
That is by decision, not any inherent property of the network. Initially bitcoin had no blocksize limit, which was consistent with the whitepaper. One was later stealth hardforked in due to fear of spam attacks. In hindsight spam attacks are a non-issue and can be controlled by min tx fee.
Bitcoin was 1mb in 2009. Moores law shows that capacity doubles every 2 years. So for us in 2022, 64mb is equivalent to 1mb in 2009.
Oh. You're a big-blocker. In 2022. That's fun.

Why don't you just go and use BCH, then, and bother writing in a Bitcoin forum? You may find some people to talk about BCH in the Altcoin section, if that's your thing. For anyone else here, big blocks are just an old topic from 2016 that's been discussed to death. I doubt anyone's getting into this argument again in 2022.