Is it just ME..???
I REALLY hate modern tube fittings, as some of them are metric, and some of them have gone to "bubble flare." The lack of compatibility is stupid. Twice I've gone to the so called parts store, got from the so called parts person, a piece of tube, pre flared with fittings, and it was metric instead of Imperial or the other way around.
Then, there's the other way around. Decades, now, when I worked for the little bitty HVAC outfit in Spokane, the boss had started a tree farm. He had bought a big Ford with a transplanter unit on the back, and decided he wanted ME to shorten the truck frame. I went down to Skaggs in Spokane, to get **** to plug the brake tubes while working on it. I listed some 3/16 and 1/4" inverted flare plugs and couplings, to do so. This kid rolled out with COMPRESSION fittings. Then tried to make it "my" fault. "You have to TELL me what you want." "Well I DID!!!" I grabbed the manager, and told him, "I want you to give that kid a catalog, and tell him to learn the difference between compression and inverted flare!!"
Frankly, I see no reason for inverted flare. In my opinion, SAE flare are much better, or even JIC/ AN