>>15793225
Mac BC is absolutely terrible in the OS X/macOS era, and was usually only decent even before then:
>about half of OS X software and 2/3rds of drivers targeting an OS just one or two versions older or newer is broken or nonfunctional
>32-bit 80x86 software, including anything in Carbon, is officially deprecated and may become completely nonfunctional soon, 32-bit drivers have already been nonfunctional since 10.8
>PPC software won't work at all past 10.6 as >>15793297 notes
>"Classic" emulation for pre-OS X software was removed in the PPC version of 10.5, never even ported in the original 80x86 version of 10.4
<"Classic" emulation was actually more compatible than OS 9 itself on the same Mac IMHO
>OS 8 & 9 had a strong tendency introduce bugs in OS ≤7 software, and a substantial tendency to introduce bugs even during x.1 or x.x.1 updates
>System 7 broke much System 6 stuff, but had very stable compatibility across its many versions
>System 6 almost completely broke BC for most everything earlier
>Compatibility earlier than that was generally fairly stable, except for a few hard breaks (Multifinder, 24-bit addressing, HDD/HFS, color/depth, Sound Manager, etc.)
I should add that the post-OS X era's problems are greatly exacerbated by hardware incompatibilities of a technically arbitrary nature, in contrast to the huuuge official support range for OS 8.1, and substantial official support of 8.5-9. For instance 10.0 not supporting 604s or G3/G4 upgrades, 10.1-10.4 dropping models on all kinds of dumb justifications (Old World ROM, wrong GPU, CPU clockspeed), 10.5 dropping G3 support, 10.6 dropping PPC support, 10.7 dropping 32-bit CPU support, and 10.8/10.12/10.14 dumping some more machines due to being too lazy to rewrite GPU drivers. While these limits can usually be bypassed, you end up with a Hackintosh level of official non-support, which for the typical normalfag means any Mac older than about 5 years is liable to be dropped from official support.