Not a musician, but as a hobbyist composer and music theory enthusiast, I think anything more than 24-TET is overkill in terms of daily practice. I don't think

Not a musician, but as a hobbyist composer and music theory enthusiast, I think anything more than 24-TET is overkill in terms of daily practice. I don't think there is sufficient expression to adding anything more than quartertone to justify making your theory and practice so much more complicated. 24-TET is convenient because all your 12-TET theory works exactly the same, except now you have quartertone, in addition to semitone. This gives really interesting intervals, although not all of them will be usable in practice. In terms of instrument practice, 19-TET is a good middle ground since it maps unambiguously to 12-TET while introducing useful and expressive intervals such as septimal minor third.