I had Ultraseal in my SM wheels for my old Dominator. I don't believe I ever had a puncture, but if I did, then the stuff obviously worked. I use slime in my push-bike tyres and that has paid off. I think they are worth having in tubed tyres: less so on tubeless, IMO.
I also used those valve cap pressure gauges ato save the hassle of checking , but I removed them when I heard stories of the added weight damaging the valves when the wheel was spinning fast and centrifugal forces could cause valve failure. Never happened, but did not want to find out the hard way.
Adventure: it's an experience, not a style!
(so ride what you like, but ride it somewhere new!)