I used protonmail in its early days but stopped after they started putting resources to pursuing cryptocurrency when their mail service was still not totally complete and while they also had ambitious plans for a whole office ecosystem as an alternative to Google docs etc. Seeing the zeal for this cryptocurrency angle at the time evaporated any trust I had in their product decision-making.

That and I remember a lot of their marketing being around the fact that they had ex-CERN employees but IIRC they weren't working on anything cryptography or security related at CERN so it sounded like they were just assuming scientists are smart so people will just assume their product is safer, which was a bit sus.

This chatbot thing is totally in line with that so I guess they haven't really changed.