You are right about before 1990, but already in 1990 Windows 3.0 was released, which had a non-negligible amount of users, even if most Windows 3.0 users typica

You are right about before 1990, but already in 1990 Windows 3.0 was released, which had a non-negligible amount of users, even if most Windows 3.0 users typically switched continuously between using Windows 3.0 and MS-DOS, because they continued to use various MS-DOS applications, e.g. Lotus 1-2-3, WordPerfect and so on. In 1990, far away from USA, and where computers where relatively much more expensive, I have started to use a 80386DX-based PC/AT clone on which (besides MS-DOS), I have used two 386-specific operating systems, i.e. Windows 3.0 and SCO UNIX (a couple of years later I have also used on it other 386-specific OSes, e.g. IBM OS/2 2.0). I agree that during its lifetime more 80386 users must have used MS-DOS than other operating systems, but already since 1990 there was a non-negligible number of users of 80386 in 32-bit mode, with Windows 3.0 and its successors. Moreover, even many of the strictly MS-DOS users were using EMM386.SYS in order to access the memory above 1 MB within MS-DOS programs. While EMM386.SYS does not count as a complete operating system, it was a program using 80386 in its 32-bit mode that was an essential part of MS-DOS after 1990, because already by 1990 most 80386 PCs had more than 1 MB of memory, with 2 MB typical for the cheapest and 4 MB typical for the more expensive.