Glue stick is needed?

Hello, I’m interested in this story of avoiding glue for prints, using alcohol spray you avoid glue??
Today how do you avoid glue, you don’t put any and that’s enough? or did you change settings?
Currently I am doing a test with a bed at 55°C, the info comes from this page: No need for glue on the cold plate. Change the 1st layer height

Otherwise why Bambu puts back the glue, I don’t know but in terms of marketing it sells tubes and bed diapers.