If you’re reasonably tech savvy and on linux you can use hydroxide to bridge a free protonmail to thunderbird. I’ve been doing it for ~a year, I suspect they don’t kill it for ratings, but I only have free protonmail on my GrapheneOS phone with forwards from thunderbird for specific things, works great…
I like Kinoite, have been happy for a year or so (how time flies). Pretty bulletproof, automatic updates and rollbacks, lotsa good stuff. One minor but relevant gotcha is it doesn’t like docker particularly much, I found the path of least resistance was to move to podman (which is more secure, can be easily turned into (–user) system.d units and has a cool auto update feature), podman-compose is your friend…
Consider immutable, I use ublue-kinoite (fedora spin ‘with batteries’) and use a distrobox Arch for the AUR and development, best of both worlds, rock stable main OS, cutting edge rolling release as needed. I’ve been very happy, and if you’re using for uni and work, reliability should be a consideration.
Why not both ? Toolbox is the fedora/redhat solution, which is the why, and makes it the choice when something’s in the fedora repositories, or if you want to trial it before (considering) rpm-ostree install, but an Arch distrobox gets you the AUR, not to be sneered at…
It’s fairly trivial to craft a dummy file that has the same hash as any given file, the chance of that happening randomly is infinitesimal, hence the usefulness of hashing, but it has been done in the past as a way to poison torrents.