I guess to me 90g/day seems to be on the low end of the spectrum since I've been in the a community of people that regularly go for 1g/bw.
This is just anecdotal but when I'm IF'ing I seem to need less protein and calories overall in my day for maintenance than when I'm eating 3+ meals per day.
"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."