I have been using a Linux smartphone since 2010 an I certainly do enjoy it - first Nokia N900 & N9 followed by a series of Sailfish OS[0][1] devices, with Xperia 10 II with Sailfish X[2] being the latest one.

[0] https://en.m.wikipedia.org/wiki/Sailfish_OS

[1] https://sailfishos.org/

[2] https://shop.jolla.com/