I looked into proton pass ~9 months ago and it just wasn’t ready. Needed a few more features before I was willing to move from Bitwarden. However, I gave it another look 2 weeks ago and proton pass satisfied all of my needs. Since I was already paying for proton unlimited, it just made sense for me to change. And it’s been a perfectly good experience so far! A couple of thoughts:
While I do run Linux, I don’t need a native app for it. I exclusively use a browser extension on my desktop. It does everything that I need. I do use a native app on IOS and it works quite well.
The 2fa in proton is pretty good now, which I needed. It can also store other types of data like credit cards, identities, etc. But it’s not quite as good at identifying fields for auto fill. Pretty close though so I’m not bothered by this.
My biggest ”complaint” is protecting my proton account. I use it for email, storage, etc. so I can’t accept a weak password for it. But I also need to have reliable access to other passwords stored in proton pass. For this, I want something long yet memorable and easy enough to type out. These two requirements are roughly at odds with each other.
My solution for now is to keep my Bitwarden account and use it as a source to recover my proton account when necessary. I think it’s a good pattern actually and I may expand this in the future with methods like syncing data between the two tools.
That basic idea is roughly how compression works in general. Think zip, tar, etc. files. Identify snippets of highly used byte sequences and create a “map of where each sequence is used. These methods work great on simple types of data like text files where there’s a lot of repetition. Photos have a lot more randomness and tend not to compress as well. At least not so simply.
You could apply the same methods to multiple image files but I think you’ll run into the same challenge. They won’t compress very well. So you’d have to come up with a more nuanced strategy. It’s a fascinating idea that’s worth exploring. But you’re definitely in the realm of advanced algorithms, file formats, and storage devices.
That’s apparently my long response for “the other responses are right”