TUIs are a creative constraint.
TUIs are an invitation for programmers.
TUIs are doing "less" to render.
TUIs don't need to be "responsive".
Hello World is TUI.
I'd take TUI apps over electron apps everytime as long as the UX is good.
Nowadays, you are more likely going to struggle with plugging your laptop into a 320Volt outlet than have a terminfo problem.
It’s much easier for the clanker to loop on testing / improving the TUI than a real GUI. It also means it can work on the app without an API/REST/HTTP/Java/Script ball of mud in the middle.
Making GUI apps has been way too hard on all platforms since forever. Frankly I think it's gotten worse for 20 years. People started fleeing to web wrappers like Electron to escape the horrors of native UI development.
So if that was the reason why you made a TUI, take heed. LLM's can chew through UI frameworks for you.
But I solidly believe TUIs are often better than GUIs even if they were equally easy to make. They liberate your app from having to follow the fracture and fashions of GUI's - Liquid glass, Windows 8, SwiftUI, WinUI3, QT, GTK or whatever. A TUI allows muscle memory that you learned on Solaris in the 90s to work fine in windows 11 in 2026.
What the what now?