I've also had an S8 for the past 2-3 years. I remapped Bixby button (home button, or double click+hold for flashlight, even when locked). I also use almost none of the Samsung apps. I use Novalauncher which is better than any other launcher I've tried: lets me hide everything I can't otherwise uninstall, and with ability to set grid spacing/sizing lets me have a single (non-scrolling) page of "all apps I care about" I can swipe up to get to.

Totally happy with it.