This is like exactly what I imagined... I'll study this and see if this is something I can do in a few weekends (the answer is likely no as I don't have a lot of hands-on engineering experience, just basics of EE and soldering). Is there any consumer product like this (not necessarily typewriter, e-ink or dumb display would also be ok; I just don't want a full-fledged display that can print images).

Computer distraction is killing my life and I'm currently spending Saturdays as no-screen day (no phone/computer use) but I'd be willing to use a calculator-on-steroids like this as a replacement, which I imagine is not as distracting. (Usual TI programmable calculators are what I'm eyeing right now but their keyboard is not good. I want a usual Qwerty keyboard and linux)

Watching him use ED on the teletype, the lack of ED's interactivity and terseness suddenly makes sense! Though obvious now, it never occurred to me that the tool was designed around physical printing interfaces.

I recently picked up a couple deaf tty terminals[0] for free from a local junk shop. They have a bright green vfd display and print to a roll of thermal paper, they feature a big acoustic coupler on the top for a phone handset and have a nice physical keyboard. My plan is to record the tones for each letter, then rig up a pi as a serial-to-audio adapter with a cheap 'retro phone handset to 3.5mm plug' product that can easily be found for ~$10 in the usual places. I can leave the original hardware intact and have a fun terminal. [0] https://teltex.com/ultratec-miniprint-425/