I had my tonsils and adenoids out at age 14 (not an adult, but older than the average tonsillectomy patient.) They were removed by laser.
First, the good stuff: I had been sick once every few weeks for years before that. After I got them out, I didn’t get sick NEARLY as often. I also lost a lot of weight in my face, where my adenoids had been so swollen.
The bad stuff: It really sucked. I didn’t eat anything other than popsicles or Kool-Aid for over a week, and very little after that. I couldn’t talk for about a month, and when I did I had to re-learn some of my vowels (E’s came out really nasal.) They cut off my codeine a few days into it, and all I had was Tylenol. I was praying for the four hours to be up so I could take another dose.
I found that ice ground in a food processor helped alot. However, I ate so much of it at one point I completely numbed/paralyzed my throat, and couldn’t swallow.
I wish you luck! At least you have the internet. That would have been nice during my recuperation period.