Mildly off topic, but getting to the original GUI vs TUI debate: Speed can also be a factor. I've yet to find a GUI file manager that is better than Midnight Commander/Far. I think there are some graphical orthodox file managers, but I could never do things as quickly in them as I could in mc.

So sure, add keyboard support to the GUIs. That's always a good thing. Just make sure they're also as responsive as in a TUI. Dialogs should appear instantly, etc.

The other headaches I've had with GUIs (in Linux) is the appearance can change if an underlying library changes. Even if I haven't upgraded the SW, if I upgrade one of the toolkits it relies on the app's appearance and behavior can change.

Somehow this is never an issue with TUIs.