Here are some other reasons for practicing Ashtanga Yoga. I love you :)
If you travel for work then the practice is portable, goes with you, nobody needs to tell you what to do, you "know the routine"
The Primary Series which is the first series of postures you learn is called "Yoga Chikitsa", or "therapy" and it is the series that restores the body to complete health, it is healing in motion.
You only add postures when you are ready to add more
The Mysore style does not have a "fix time to start" if you practice at a studio, the practice is your own and you start and finish when you can (this is really liberating!), and teachers correct you individually