There really weren't "PC users" in the 1980s in the sense that we think. Most PCs were glorified wangWang terminals with lower resolution displays and used only to run WordperfectWordPerfect.
Most systems design was still proprietary and interoperability was minimal. "PC" Storage continued to remain primitive, primarily due to most decisions made by a small number of vendors that were more concerned about threatening the commercial storage business.
I worked on a BSD Unix Sun workstation clone in the late 1980s that simply had just way better storage than PCs. That and I believe the Mac also used SCSI.
Windows wasn't really considered a serious general purpose product until Windows 3.0 in 1990 anyway.