i really hate the talk about unrankable since it can easily mean either "this is too hard for me" or actual stupid things like 1/8 streams at 200 bpmI agree ^ That's why I don't want to see converts being pulled from ranking. They are a different kind of difficulty when playing and I like to mix it up. Sometimes challenge myself with oni and sometimes just a difficult convert
i've spent 2 years playing with hr on and now i can play with sv/od that would be considered (usually) unrankable. same goes for big note patterns like Ddd and ddKdd. i couldn't do these before so i practiced and learned how to do them. what specifically makes these things unrankable
on the other hand i've run into plenty of maps using high bpm 1/6 and 1/8 that i'll never be able to fc but others can. this goes for taiko maps and converted maps. http://osu.ppy.sh/b/157233&m=1 even though this map has really easy patterns i can't fc it because i'm too slow. i'm sure no one thinks this map shouldn't be ranked because of its speed, so why would another map not be allowed to be ranked because of a fast sv?
summary: "too hard" isn't a good reason for unrankable