I’ve heard good things about flavor with rayon and needing less flavoring but also heard they can potentially be bad for our lungs. This was second hand info from an untrusted source though. I’ll have to try some.
I've never heard anything like that, sounds somewhat like "don't you know you're vaping anti freeze?"
Heck, vaping might be bad for the lungs, as in about 95% less bad than smoking
Rayon has a higher combustion temp than cotton, so less chance of burning it and inhaling any "smoke" from it than with cotton.
Wicks faster, a real boon for those who like high VG. Less chance of a dry hit that can (maybe) produce some actual toxins that combust tobacco also produces.
And yes, often less flavoring needed, and those are another set of ingredients that we really don't know if they're long term safe. (Well, we've not been at this long enough for long term...) So reducing them may be a good thing. (And it's slightly cheaper
)
Sounds to me like it works better and may be safer