I’m in the same boat - can’t wait to have a fully integrated alternative to Obsidian in my Proton suite. They are certainly working on a step by step integration, although in Proton speed. So maybe in a few years or so.

Apart from that I don’t get why they make that argument. If that sounds good to you, use Signal.

Unlimited for seven or so years now, never regretted it in the slightest. I feel like they throw some bonus to you whenever they can - under promise, over deliver. I’ve been burned a lot by companies that became evil over time, hence I’m careful with praise but so far Proton has been one of the most pleasant customer experiences I had.

Although I like the idea of the dedicated app, the bridge lets me read my proton mails and work mails in the same app so pass for me.