Yeah well they wanted Intel to be one too. I don't think you can buy a phone running x86 or x86_64 new anywhere, and that was back in the honeycomb timeframe.
I had a Zenfone 2, which ran Marshmallow on the Intel chipset. Decent phone and I don't remember having many complaints other than it didn't support my carrier's wifi calling which ended up being a dealbreaker when I got moved to an office that doubled as a faraday cage.
I think that has more to do with Intel failing to offer any competitive chips in this space. The entire company seemingly assumed phones and tablets were just a fad and spent the better part of a decade treating AMD as their only competitor.
It was also much more expensive than comparable ARM chips with no benefits - in fact it came with the huge drawback that it was a completely new platform in that space.
That'd depend on who you ask. Many will tell you any RISC choice is better, and there's no reason to use x86 when not tied by having to be compatible with legacy applications.
You can buy a Librem new (or rather any struggle struggle is because they're sold out, not because they're not being made) and it runs x86, though I don't think that undermines your point by much.
