The programs that had those problems also probably jumped directly into the KickStart ROM and expected it to be of version 1.2. When KickStart 1.3 came out quit

The programs that had those problems also probably jumped directly into the KickStart ROM and expected it to be of version 1.2. When KickStart 1.3 came out quite a few games broke. I know of only one case where some german demo coders used CPU/chip timing to multiplex sprites to get more than 8 sprites per row. Most of the timing bugs were of the kind that the CPU got faster(maybe due to code running from RAM not affected by custom chip cycles, or perhaps a 68020 or better was used) and neglected to wait for the blitter to be ready. "Fast-RAM" was common enough after a few years to this not being a huge problem. AmigaOS and the whole of Amiga was a thing of beauty IMHO.