I had a Sinclair QL which pioneered the keyboard. It wasn’t great - it was far behind the Acorn BBCs and the Commodores) but it was quite usable.

There was significant vertical travel, and there was variation in the push the key gave back - increasing to a point of no return, then a quick downward movement to the thunk of the end of key travel.

I could type moderately fast on it.

I’m going to suggest food items that we still take from nature and eat with minimal preparation:

• Honey
• Fish like salmon, trout, grouper
• Shellfish (eg oysters)

We have evidence of shellfish and fish being eaten for a very long time - at least the middle stone age at 140kya - in middens which are 10s of thousands of years old.

Honey is likely to have been a food source - a treat even - even before humans left Africa (so before 100kya) but sadly this would be invisible in the archeological record

My god that brought back memories. The first commands when sitting at a new terminal was always, always:

stty sane

stty erase '^H'

It was well into the 2000s before Unix had useable defaults.