https://en.wikipedia.org/wiki/OS/2 was pretty decent. as was a Mac. Or Amiga. They all had decent software stacks. Microsoft did the best job selling to businesses as well as consumers. But when there was competition, I often chose non Microsoft stuff.
Also, You were not using outlook in 1993. It didn't exist back then. The first versions came out around 96 or so. It was only bundled with the rest of office in Office 97, before that it came with MS Exchange.