after reading the previous poster i have to laugh.
too much attention is being put on things leading to moving people offchain rather than things that can optimise BITCOIN
things like schnorr signature aggregation are awesome, but we can't limit ourselves to just optimizing bitcoin. transaction size can only be improved upon so much. hal finney knew it---bitcoin can't scale to all the world's transactions. at some point, you need to consider other compatible applications (offchain, trustless or trust-minimized) that can actually scale exponentially.
as the previous posters shows, he seems he is stuck on the blocksize debate. but avoids the increase capacity debate.
segwit has not increased capacity.
sure it's increased capacity. show me a block larger than 1MB before segwit was activated.