How can i pass up the opportunity to regurgitate the same old information?
weight- maybe you'll save some weight, but that's not really the point. If you're shedding weight you're probably sacrificing some durability or some sidewall support.
pressure- to get the same handling personality from your tube-notube style tires, you'll want to run the same or MORE pressure. Foldy sidewall tubeless tires grip good with low pressures, but smear around like riding on paste, and run the risk of burping when you land crooked or ping off a rock under heavy braking. UST tires handle pretty much the same as their tubed counterparts at the same pressures, sweet. Either way pinch flats are a thing of the past.
Glop- running minimal glop is pretty easy if you have a setup that is tubeless-friendly, but you'll want to top it up ever other month or so. I prefer to run a little more glop and do a little less maintenance, but most folk would rather blame a few grams of wheel weight than acknowledge their own fitness.
I've been running 65psi on a packing tape converted tubeless setup using wtb allterrainasaurus for about 5 months now, no problems. I've put about 2k on the set up. Wire beads are cool. YMMV.