Yes…and I don’t actually think its a bad idea to do occasionally. If you can find a way to incorporate the concept of IF into your life without becoming militant/stressed about it, you are more likely to carry away life habits that will stay with you, instead of a fad diet followed by rapid weight gain during the “rewarding myself for the discipline” rebound period.
All the time, lol. I do a different type of fast though, a 36:12 split (it’s alternative day fasting, although technically “intermittent” too). So when I do break my fast, I try to keep it to a small window so that I still end up having an OMAD day or something like a 20:4 day. That’s part of the reason I do the 36:12, so I can break it and still get positive results.
I “dirty fasted” by drinking coffee or energy drinks in the mornings and still lost 50 lbs. As long as you’re burning more calories than you’re consuming, you’re good. Don’t be hard on yourself or you’ll lose the motivation.