I have changed to left handed over the last year after shooting right handed for 30+ years. I have done this for a number of reasons, i am left eye domiant, i had developed really bad form right handed, i had been spoilt by compound bows, had a sore right shoulder...
I really enjoyed the transition process and have returned to really enjoying trad archery. I bought a custom predator recurve, my first true Left hand bow and although i'm not as accurate as i would like i am managing to avoid some of the bad habits that my right hand was used to. I now shoot right handed compound (sights & release aid) and left handed trad archery.
The advantage as i see it is that you use all the knowledge and experience you have to teach a new student, the other side of your body, with no bad habits built in from muscle memory.
Good luck , it has worked for me.