From a word processing point of view, I likely could use PaperClip with my Batteries Included 80 column card on my 64 for almost all of what I do today.
Undoubtedly, I could use WordPerfect 4.1 on my A500 far more comfortably today as well. I used this setup for word processing duties from '87 to '94 before moving on to Word in the workplace.
You make an interesting point, during my residency, a professor had a large amount of data on an area he wanted to publish, but he had no access to any computers, although the department had a Wang word processor, and an IBM PC, set up to do this as well.
I offered to enter his data into my C64's Manager and ran basic highs, lows and averages on 180 samples. I then typed up the first 6 revisions of the paper on Speed Script in 40-columns. Finally, he had authorized access to ask one of the clerical staff to type up the paper on the PC.
I would still prefer Final Writer today, especially when composing documents with graphics, never WordPerfect that lacked any Amiga enhancements (No menus? Really?) .