PPSSPP texture scaling and auto frame skipping

[belmont1990]

Hello
I have 2 questions, first - is there any advantage of setting texture scaling to auto? I have xBRZ enabled and auto looks same like 3x, also my rendering resolution is set to 3x - is auto adjusting scaling power to the same as rendering?

Second - auto frame skipping, if I set skip to 1 and enable auto, is that means my game will skip 1 frame per sec. at max, ONLY IF there are slowdowns? No disadvantages to having it OFF all the time? (and supposedly get minor slowdowns in some intense parts of games like summoning in Crisis Core...)
Some people reported back in the days it is broken due to the flickering screen, is it still persistent?