While I was taught braids need to be taken out daily, friend has minis with showstopping tails - longer than body length! - that he leaves in simple 3-plait braids for weeks, vetwrapped over that.
He takes out braids, brushes through for shows, then rebraids & no loss of hair.
I have helped him put braids in & take them out & did talk him into cutting out about 1’ off the stud’s tail where sloppy braiding had it tangled beyond redemption.
Of course, I’d think a tightly french-braided tail would be more prone to hair breakage & better cut down & redone.