Btw:
1. Unihertz recently launched a BlackBerry esque phone (titan 2), if anyone reading this is interested. (Not sponsored by them)
2. There are many forums (and I think r/smallphones on reddit) where you can find much more discussion on such topics if you're interested.
If Unihertz kept their phones up to date for a few years after launch, rather than only for the few years prior to launch, they would be an incredibly strong competitor in this space but as they are they are next to useless.