Thom Holwerda, writing at OSnews about the end of the Macintosh clone era:
The rather abrupt end of the clone program means there’s a number of variants of the Mac OS that never made their way into the market, most notable variants intended for the Common Reference Hardware Platform, or CHRP, a standard defined by IBM and Apple for PowerPC-based PCs. Thanks to the popular classic Mac YouTuber Mac84, we now have a few of these releases out in the wild.
Steve’s video is rather amazing: