I don't see how a blockchain will ever be ready. They don't scale by their nature, have huge security risks (regular people don't want to manage their keys), the unit economics of running on other peoples computers do not pencil out, people don't want immutability once you think about it holistically, and many other reasons.
I think there's a few different things to think about here. Does EVERYTHING need to be on-chain? No, clearly not. but for the stuff that does it's been found that you can scale by having multiple chains. I mostly use AVAX, it's like ETH but uses a DAG for consensus, which means finality is WAY faster (seconds). It also has a concept called subnets, so scale is accomplished by having multiple blockchains which can interoperate with each other. Not all validators validate all subnets, but all subnets have multiple validators. Your need for level of security is going to depend on your application. Defi has a high need for security, gaming has a low need. The idea of 1 chain for everything is kind of obsolete.
