[betterunix2]

Distributed storage does not make any difference for lock-in with a centralized API. For example, imagine a system for storing photos on some distributed system and a popular, centralized web front-end for users. Now what I will do with the centralized front-end is to give users a "value-add" by encrypting their photos, thus protecting their privacy, and better still I will use my proprietary key management technology to relieve end users of the various problems with losing private keys. Lock-in achieved, and all you accomplished with distributed storage was to outsource the maintenance of the storage infrastructure.

We already see this with blockchain payments. The vast majority of merchants who accept cryptocurrency payment do so through a service that manages their wallet and typically offers some kind of value-added features to lock them in. There is no reason to believe the same will not happen with Web3, if it is not happening already.