Jack's vision of bitcoin seems to be full of off-chain transactions. Where he'll be a major player of permissioned "bitcoin payments" through his company. Obviously bitcoin's blockchain is the only way to create truly immutable transactions taking advantage of bitcoin's decentralized infrastructure.
People can develop new technologies, upgrades, layer 2, 3, whatever new for improving Bitcoin protocol and creating new experience for Bitcoin users as well as companies accept bitcoin.
With me, if it's feasible to use bitcoin on-chain, I would like to move my bitcoin on-chain as transactions done on chain are more secure than offchain. Bitcoin blockchain is a strongest, most secure blockchain in cryptocurrency so why I have to migrate from on-chain to off-chain while it's feasible with me to pay on chain transaction fee.