According to Mactracker, there was a CD distribution for 7.5.*, too:
OVERVIEW
Introduced September 1994
System Requirements 68000, 68020, 68030, 68040 or PowerPC processor, 4 MB (68k) 8 MB (PPC) of RAM, and 21 MB of hard disk space
Distribution 1.44 MB floppy disks, CD-ROM
Order Number --
Versions 7.5, 7.5 Update 1.0 (7.5.1), 7.5.2, 7.5 Update 2.0 (7.5.3), 7.5.5
It's not clear when the CD became available. When you get to 19 (or 16) floppies, however, it's clearly time for a change in media format!
I've been wondering about something as this discussion has evolved . . .
For many people, "Classic" covers a lot of ground and refers more to the shape of the case than to the guts of the machine. Thus, we have the confusion of several so-called "Classic" models: the original 128K Mac, the 512K and 512Ke Mac, the Mac Plus, the Mac SE and SE FDHD, and finally what Apple designated the "Mac Classic" and then the "Mac Classic II." Only the SE FDHD model and beyond had 1.4M floppy drives. The earlier models had 800K or, on that first 128K model and the 512K model, a 400K floppy drive.
System 7.5.3 disks are likely 1.4M floppies. These 1.4M disks can be read by an SE FDHD and both Apple-designated "Mac Classic" models but not by other, lower-density (400K/800K) floppy drive Macs--without additional hardware and drivers.
So, just wondering, which "Classic" does XboXC have?