Earlier quoted context omitted.
I feel like you're living in a different universe then. I will literally never fly Spirit (well, neither will anyone else) nor Frontier ever, I loath the experiences I've had on them so much. First, as someone with relatively long thighs, I literally don't fit in their sardine can seats. But more relevant to most people, while things may be OK if everything goes perfectly and nothing is delayed or cancelled, you are…
Yup, came here to say this. Once you're on the plane and its in the air, Spirit and Frontier are like pretty much every other domestic airline. There's slight variation in terms of whether you get a whole can of coke for free or not. If you're taller than me, the 28" of seat pitch vs say 31" on delta may make a difference, but I'm only 5'9". I still avoided them like the plague because the legacy carriers are selling…
Yes, if you ignore the part where things are different, it's basically the same. Trouble is, those differences do meaningfully make a difference. There's no objective measure for misery and happiness, but flying Jsx is nicer than Spirit. You can put a dollar value on misery, that's why one's so much more expensive than the other.