Because you can master it on the stages that require it, but mastering overflow on those stages doesn't mean that it'll work where physically impossible.
No, it doesn't mean that. You can master overflow on some stages where possible, but that doesn't mean overflow will work on stages and areas where it's physically impossible.
It's not possible because you'll die from the deathtraps, lose flow from the turns, and you won't be able to gather enough flow for overflow for the reasons stated.
I'm saying if you overflow on the stages with a lot of deathtraps and turns, it won't work in your favor. I'm saying it's better to use overflow on levels that have turns and a lot of deathtraps because it'll work in your favor. I'm saying overflow is good to use on the levels with less deathtraps and turns because it'll make you win. I'm saying normal flow is overall better. It's what I've been trying to get through to you this whole discussion.
FINAL ANSWER: If i annoyed you or anything like that, i am sorry. What i tried to say the whole time is that even it take a lot of time and have very low possiblity, i just want to tell that try to master overflow and use it as a advantage. For people that using flow is WAY better than overflow, go ahead.
I'm not annoyed, it was just a discussion about overflow. But since it does have a low probability, it's wiser to use normal flow. It's like the EP1 level Over and Under; the route through the saws is faster, but it's unlikely you'll get it, so it's better to use the double jump over the wall.