Another FYI: Ubuntu Touch does not support VoLTE at all, thus it might be more difficult to use it in some networks and countries (for example, USA shut down 3G some years ago)
However, I was pleasantly surprised by the responsive UI, the browser, and Cinny (the Matrix Client)
Fossify Messages and QKSMS/QUIK (unmaintained but has worked well for years)
Hype still sells and we still idolize people though. Businessmen such as Steve Jobs or (early) Elon Musk curate an image of themselves as a "genius", which leads to popularity of their products and influences trends and opinions in specific fields.
Really though, no single person did or invented anything alone. Every well-known and highly regarded scientist, inventor, or businessman built their work as a small increment on top of hundreds of predecessors. The Upright Thinkers by Leonard Mlodinow is a good pop-sci book that carries that point throughout.
I was interested in these "light" phones for a bit, but they seem a bit gimmicky and expensive. I understand not having a browser on purpose, but for communication, none of them (AFAIK) support Matrix or even XMPP (even some old feature phones had a Java Jabber client). Punkt MP02 supports Signal though.
Android phone with custom ROM (Lineage, /e/, Graphene, DivestOS...) is a possibility, and would be usable until hardware is incompatible with the phone/wifi networks.
If you have a patience of a saint, PinePhone and Librem5 are Linux phones, both in fairly early stages.
Here are a few other interesting green automotive startups that didn't make it:
This is fantastic news, and I wish them all the best. Reliable VoLTE/WoWiFi calls was my main (but obviously major) issue with the PinePhone.