- Just like Google it has an app and a web interface. Seeing that OP is looking to replace Google and didn’t mention self-hosting, this seems a good fit.
- Proton does provide e2e encryption.
- What does US citizens using it have to do with anything? Proton is not based in the US.
- Your last point is a maybe and remains to be tested in practice. If this is a concern, then take it into account.
For me personally it is more important that my data doesn’t get mined by a big company, and that I use European services as much as possible, and preferably open source. Proton is a good fit for me, and may be for OP.
They all still rely on YouTube for content. Of course the problem is that the real alternatives (such as PeerTube) have only a fraction of the content.