no one (jk)
osu!lazer is cute to use but it's such a hassle to make sv maps/ 2b maps
also not to mention complicated mania sv maps will not work properly in lazer because the map sometimes uses bpm to determine its speed rather than adding timing points (i.e. using bpm 600000 to determine absurd speed rather than bpm 600000 with x10.00 timing point (too extra) )
conclusion: use stable (very subjective)
example of an osu!mania sv map that will work properly in stable but acts weirdly like crack in lazer
beatmapsets/2316805