I use it almost exclusively/when it makes sense to. But so many people are surprised that I use it.
Part of it is because I was an android user until about 2015 and that was always a feature on the phones I had. I also use it because I have small hands and the biggest iPhone so I find it easier to type one-handed sometimes.
Honestly no, I’m not a huge fan of sliding my thumb all over the screen and typing with one hand is about as fast. Didn’t use it much when I was in Android phones back in the day either.