alt Hacker NewsI did not claim it (another user did), but I think your reaction captures the overall sentiment ITT, which is taking perceived status quo as some fundamental thing and defending the worse solution instead of changing the status quo. If all that energy went into perfecting GUI apps the way you want them to work, the ecosystem would have been much healthier. I've seen it in Electron already, and TUI apps are headed the same way, it's simply inevitable. The JS and Python bloat and fragmentation of conventions are already there, reinventing things that used to be simple in a complex way is next (in a way it already happened, e.g. a ton of basic things like hotkey schemes have to be reinvented from scratch each time in TUIs).
I don't understand what you're responding to.
TUI apps are multi-instance by default since the user can invoke the program in different pty sessions. The developer would have to actively fight that.
GUI SDKs generally require the developer to pick a solution. And it's easier to default to the simpler solution where you have one instance, one data model, one window.
Whether things might change in the future isn't relevant because we're talking about how things are today, not speculating about the future. And the time to change one's opinion is when reality changes, not ahead of time based on how you think things hopefully will be.