I had rny 6 months ago. Decaf was fine for me, but it tasted horrible to me (I’m sure this was a mental thing) after about a month or so when everything was healed up, I went back to regular. I have one fried that is 10 years out, one that is 5, and one that is a year and none have had any issues from “real” coffee
Re: stomach growl. I work from home a few days a week, one day I was sitting at the computer working through some super boring tasks and was wonder why the dogs were fighting. Turns out, it was actually my stomach. It will make some hot mess noises after surgery. LOL. as far as hunger goes, the true feelings of hunger where your stomach hurts didn’t return until this week. I’m 6 months out. But just a little snack calms it down. I don’t feel the need to eat anything and everything that isn’t nailed down. LOL