word 5.1 and excel 4, Mac, were the last products out of Redmond that I saw any reason to buy (and I did).
At the time, Word on the Mac and Word for dos had *nothing* in common other than the name.
Well, they could *kind of* read one another's files--but you lost things like inserted charts in the process!
The Mac Word was the best available at the time (unless you needed certain things like WP), while the DOS/Windows version was a distance third, propped up only by the lack of a viable fourth.
Word 6, though, tossed the Mac version and imposed the second rate dos version on everyone. It was reported that a researcher found timing slugs in the Mac version so as to make it slower than the windows version.
Anyway, many things that worked and were useful in 5.1 (usable equations, anyone? plain text mail merge?) were gone in 6, replaced with glitz. And to add insult to injury, when word 6 opened a 5.1 file, it would rewrite it in 6 format *on opening*, and without seeking permission! I think it was even overriding RO status, as I recall having to use physical write protection on diskettes.