I have a friend who (just like me) has had a FP3, we were both very happy with it. Not sure why but he needed to replace it, got the FP5 but it was to clunky for him. Replaced it with a Pixel with Graphene likes it a lot.
I’d still still perfectly happy with my FP3 running Lineage/MicroG but my SD-card slot seems to be broken and I’m running out of space. I’m getting a FP5 in about a week, let’s see if it’s too clunky for me as well ^__^