ADVENT - yes, the vaguely religious result of having to truncate all your file names to six characters or less. I seem to recall that RDOS had the same limitation.
The five-hole tape days were on an Elliott 803, after school at the local technical college. That was really basic. The tape punch had a mechanical typewriter keyboard but no printing head, so you couldn't see what you were typing. You took the tape to a separate verifier, with a platen, paper and a teletype print barrel, which read in your tape at one side and punched out an edited copy on the other side. Programs were small.
The computer had an electro-optic reader, and the program you'd spent ages crafting was read in one quick zzippp. The 803 had a speaker that made different noises to indicate run states, and we soon got used to the noises associated with failure
Punched tape has had a surprisingly long life, outlasting Hollerith cards. In its more modern form, using Mylar rather than paper tape, it is durable, relatively easy to store, and completely immune to EMP. Military systems have used it until quite recently.
Mylar tape is hell on the punches though, blunting them after very few rolls of tape.
My Atari was a 1040STf. An excellent machine in its day, but couldn't keep up with the IBM juggernaut once they entered the market. Early IBM PC's were rubbish, though. Windows 3.1 is where they became ubiquitous.
The Atari 400 "keyboard" is the complete antithesis of the IBM Model M (which is where this nostalgia all started). Trying to use the no-feedback flat torture device shows just why the Model M and its ilk are so well thought of, and why tactile feedback is so important to getting sensible typing speeds on a Scholes keyboard.
I'm using an old Microsoft keyboard,a KU-8933, which has a USB connection and full-travel keys, but not the positive feedback of a Model M. I keep looking out for them, but expect I'll have to shell out for a modern version from Unicomp.