What are your views on attempts at Linux on Phone?

While I like the idea of GNU/Linux on a phone, I have been considering if there are technical merits to the way Android turned out. I asked a related technical question on another sub earlier if you are interested in reading it.

What are your thoughts on these endeavours from a technical point of view? as opposed to endeavours like Graphene OS on the other hand.

Edit: thank you everybody for your answers and for these two posts and Daniel's cited post. I've been thinking that if usage of phones with the GNU/Linux stack ever became acceptable, the stack will bring its problems with it. Difficult manual hardening and messy filesystem. For a device with the main purpose of communication, I don't want a new update somewhere or some random installation to break my ability to call, no thanks. Add to that, as Daniel said, apps are not isolated from each other. The more I learn about Linux the more I discover more mess.

Finally, the kernel with loads of bugs is true for GNU/Linux phones and AOSP phones. But Daniel said he wanted to move on to a different kernel at some point, I wonder how that is going.

Yeah these are some serious things to consider.