Mig is considered the better wire feed choice over flux. Cleaner, less mess, prettier. But that does require greater efforts to prep, setup a good weld station, cleaner materials, etc. Tig is even more sensitive to conditions than mig.The only flux cored welding I did in college was dual shielded. Mainly because very few shops use self shielded flux cored. Its seen as a hobbyist or farmer's only type process. Or at least that's the vibe I was getting.
On the subject, I'd suggest people watch Weld.com videos on YouTube. Quite knowledgeable group of welders on there. Video I watched from them today from several years ago was Flux cored self shielded stainless steel wire. Such a thing exists.