Since it was brought up elsewhere, studying from vis.
https://forum.atlas-games.com/t/what-to-do-with-incredibly-excessive-score/9710/1
It's possible to get an open-ended result and end up with a huge score, although the likelihood is remote. It's much more likely, given the amount of vis that might be used, that you'll botch, which means wasting the season, contending with a possible Twilight episode, and not earning any XP. On the averages, studying from vis doesn't seem so bad, except when you consider the very likely negative outcomes at higher Art scores, the general propensity for their being a thriving book trade in the Order, and then the sheer cost.
If the average aura is 5 (it's not, but let's assume it is) then an average roll would provide 11 xp, about the same SQ as a sound tractatus. A sound tractatus costs 1 pawn of vis, studying from vis only costs 1 pawn when Art score <=5. Even if you bottom feed and get really subpar tractatus and grind away at 8xp per season, you're still going to be better off, because you're spending less vis AND you never botch.
4th edition had it partly right in tying the experience earned to the amount of vis sacrificed. In 5th edition, no one studies from vis unless forced to do so by circumstance, and even that is an extreme case.