I guess the main issue to be argued here is a poorly defined "it". What does every app need? State management? Lightning-fast interface updates? Counts incremen

I guess the main issue to be argued here is a poorly defined "it". What does every app need? State management? Lightning-fast interface updates? Counts incrementing in three places at once? For the 10-20% of apps that get built in React/Vue that actually "need it", I believe that 90% of them would be better served by Rails + Turbolinks 5 + Stimulus. Most of the people who rally behind the SPAs for everything mindset came up at the peak hype moment for React and friends. There's an unfortunate tendency to believe that the thing you're thinking about right now is more important than it actually is. If you're not working at a large company, you most likely do not need these tools. Nobody is going to come in the night and take them from you, but boy, everyone would iterate a lot faster if they didn't spend so much time bikeshedding and obsessing about state mutation.