Ol’ reliable, my SC31 Pro SST-40 5000K. Had it about 5 years now, finally got an 18350 tube for it. Still Anduril 1, still a great light. Also have my Garmin Fenix 7 pro as backup, flashlight on your wrist is handier than you’d think :)

Depends on your own use case but I’ve been using BlissOS (https://blissos.org/) on an old HP Elite X2. As Bliss is essentially just Android-x86, it’s fairly polished; only thing that I haven’t figured out is configuring the hardware volume buttons.