I say they can, this is kind of what we have seen with Chrome tbh.

Google came in, made an awesome browser got market majority and started just implementing things to the point where its hard to keep up and the various specification bodies kind of just have to ratify things that is already in the browser or become obsolete, afaik this happened with components such as the in browser DRM which by design makes it hard to implement.

I think this can come true as long as we let them insert themselves into the ecosystem. The difference here is that we have the option to keep our part of the fediverse pristine by not federating with these servers, even if we doom ourselves to obscurity by doing it.