Segwit alone is not a solution. Segwit + Lightning isn't even a solution on their own. Larger blocks will be required, may as well increase them now since the network is already strained, high fees demonstrate that very clearly. What's extremely unsettling is that hardly anyone manages to understand these requirements.
Another thing I don't understand is why Core doesn't handle the hard fork. Most of the whining about Segwit2x is about control over the network; why doesn't Core maintain control WHILE expanding the block size, which is absolutely in the best interest of the network. The ridiculous aspect of all this is that a 1 to 2 MB block size change won't even alleviate Bitcoin's problems, it's too little too late. Core should be putting out a block size increase from 1 MB to 8 MB, Segwit2x wouldn't even need to happen and Bitcoin Cash would be rendered completely pointless. Keep in mind: anything even CLOSE to mainstream adoption would require 100MB blocks or larger, on top of Lightning. Shrieking about a 1 to 2 MB change shows an extreme ignorance about future requirements. The bottom line is that Bitcoin will either not be as decentralized as hyperventilating purists want it to be, or it will fade into irrelevance as it continues to be a piss-poor payment network nobody can actually use on a day-to-day basis.