Tret Rest Days?

Say you're really used to Tret already (0.1%) and can tolerate that nightly. You even have 20% AA in your routine. Despite daily tolerance, is there a reason to not take it nightly? Maybe have 1/2 rest days per week?

Was wondering because I have this day in my week where I'm so tired once I get home that having to do a lengthy face routine is kind of a hassle. So I'm wondering if rest days have any use, and if they are, I'd gladly put it on that day. Or do I not maximize results if I don't take advantage of the fact that I can tolerate both daily?