I'll be honest I had no idea that access to Ethereum is effectively gate-kept by two centralized entities (Infura, Alchemy). I knew there were only one or two true Ethereum full-nodes, but the impact of that never quite clicked. [edit] By "full node" I meant "archival node."
The problem with this is that running servers that store and process one or even multiple blockchains in a searchable way is terribly costly and inefficient. In theory the public ledgers are all safe against locking away data, like Google or Microsoft could do with your accounts in the real web, but in practice nobody wants to be the guy making a loss on serving blockchain views.
If web3 ever gets off the ground, it needs more of these access provider companies. Perhaps even a prebuilt system you can throw onto your own server to participate, like IPFS and other existing decentralised systems provide.
I'm still not clear on the actual benefit of the cryptocurrency web other than the concept of "owning things without legal protection or oversight" which I (and I believe most people) have very little interest in if it comes at the premium it comes at today. From a technical standpoint all of this blockchain stuff is awesome, but it's an awesome solution in search of a problem.