Flows here with yellow tape.
Official advice is to use a rim strip for tubed tyres and yellow for UST.
Mostly I think this is to help with airing up. UST beads are much smoother and better formed to make a bead interlock with the rim, as well as being a bit tighter. I’ve successfully air up a variety of tubed tyres (use of a compressor) and as long as the bead is fairly smooth and well formed they’re been fine.
I especially like Michelin All terrains for their bead. Maxxis advantages are good, but I wasn’t satisfied with the bead on a set of high rollers – too rough and reluctant to sit in the flows bead socket – even clean and lubed. I know others here have run them successfully without a rimstrip though.