Windows NT 3.1 seems to have come with a CD, a complete installation set of 3.5" discs, and even boot discs for the CD on 5.25" discs (and a voucher for a 5.25" complete set). So Microsoft obviously thought 3.5" discs were often going to be needed back in 1993 (and there's a notable number of people that have a CD-ROM drive, but no 3.5" drive?). See https://socket3.wordpress.com/2016/12/24/ebay-purchase-5-mic...
Frankly, I'd count Windows 95 as really being in the CD era, floppy software was getting rare than (although apparently there's a even a 39 disc floppy version of Windows 98 if you're a real masochist), but a couple of years earlier CD-ROMs were still quite niche, although a high end workstation does seem a likely candidate to have one.
Frankly, I'd count Windows 95 as really being in the CD era, floppy software was getting rare than (although apparently there's a even a 39 disc floppy version of Windows 98 if you're a real masochist), but a couple of years earlier CD-ROMs were still quite niche, although a high end workstation does seem a likely candidate to have one.