One thing about the "professional" DOS software (and you can see it in things like Emacs - eight modes and constantly shifting) was you were basically expected to live in it - it had the full attention of the computer and the user.

You were also expected to learn it; which meant you became "one with the machine" in a way similar to an organ player.

I remember watching Fry's Electronics employees fly through their TUI, so fast that they'd walk away while it was still loading screens, and eventually a printout would come out for the cage.

> it had the full attention of the computer and the user.

This why I like to use the full screen mode of my editors and IDEs.

It surprises a lot of people who see my screen. Full screen features are everywhere but rarely used.

Paying at Best Buy was torture - watching the cashier move their mouse around (on the slanted mousing surface they were given so they couldn't just let go) and click the buttons, going through 3 or 4 screens and waiting for them to load vs. using the keyboard. They would have been done with me and on to the next customer in half the time.

About twenty years ago I did a consulting gig for a government agency that wanted to create a web interface for their CSRs to replace the green screens they had been using. The long time employees hated it because they had deep muscle memory for most tasks on the green screens and could get far ahead of the screen refresh. With the web UI, not only could they not type ahead, but many of the workflows now required use of the mouse.

The agency was happy to have something new and modern but more important to them was that new employees could be trained on the system far faster. Even though there were a small number of long term employees, they had high turnover with the frontline CSRs, which made training a major issue for them.

The old TUIs were faster yet I still prefer IntelliJ; it's fast enough and much more powerful.

Even normal windows applications used to be like this (outside of crashing). I could alt-tab, type stuff and click where I know a button would show before I even saw the application window. It never missed a key stroke or type into the wrong window. Nowadays you load a webpage and start typing, and half you text appears and then the other half just never shows up.