Lineage gives you a decent app ecosystem (F-droid) with the option to set up Play Store for full Android compatibility
Ubuntu Touch has a very limited ecosystem compared to F-droid, but might be enough for someone willing to do most tasks in a browser.
Stuff like phone calls, pictures, sms, podcasts, music, and other simple tasks will work equally well on either OS assuming your device is supported
That number shows across all versions, regardless if they have been patched or mitigated
If you look on that site at current versions only it looks very different
iOS 18 - 30
iOS 18.1 beta - 0
macOS 11.2.3 - 0
Windows 11 22h2 current patch - 0
Fedora 41 - 1
Android 15 - 7
Ubuntu 23.10 - 2 (for some reason 24.04 and 24.10 are missing)
It’s a pretty interesting site!