The Spirit approach means you are incrementally charged for everything. I think our expectations of free peanuts or a soda from other airlines taints that.
In theory, since I have a libertarian streak, I like this, but the hassle of each tiny incremental item being another charge occasion reminds me of the logical extension of roads for tolls. In other words, yes, government can make no roads and allow private land owners to charge a toll for every new property you now have to pass through, but manning those toll places and not knowing what was fully included or allowed for each land owners’ land makes things incredibly inefficient and not practical. This is how Spirit works, though. There's no “complete” package to buy to lose all the one-off hassles, mimicking a normal airline ticket.
I personally know a Spirit pilot, so I hope he comes out of this, well. He's a truly nice guy.
Pilots always do well..................