One aspect of this that independent site admins often have to deal with is CSAM filtering. Many jurisdictions require it in some form but by definition you can't "roll your own" automated solution because how could you? Centralized solutions like PhotoDNA are not available to most people.

With most other things I can see open source solutions prevailing, with this I can't. This will likely be the thing killing the decentralized Internet of ye olden days for good.