No glue is needed with Prusas. It have been that way for 6-8 years.I just got the textured PEI plate a few days ago, and with both PLA and Tough PLA from Bambu (a pretty great material if you believe YouTuber strength testers) it does NOT require glue. Sticks great, pops right off with no residue.
It does put a texture on the bottom of the parts, but it actually is smoother to the touch than it looks and is quite attractive, IMHO.
Nice to be able to just crank out a print without laying down glue first.
Haven't tried anything else on it yet, but it's marked for PLA, PC, ABS, TPU.
Will add one tip. Do not print PC or PC blend without a glue stick. You might get luck a couple times, but eventually, you will destroy your build plate.