I had fun with hypercard on MacOS 9. At work, even. The boss was into rapid prototyping, and I cooked up some damn productive stacks in a hurry.
It runs on the Cube and under OS 9 emulation on the new stuff.
Hypercard scripters did cool things that most users don't do today. And without those monster data centers.
Maybe in the future I won't have to make that choice! I'd much rather dual boot OS 9 off a different partition, but that hasn't been supported on the 1-1.25GHz models (Thanks Steve...) and no one has gotten it working properly. Maybe now it will be possible! A man can dream...
++ BBEdit
The 180 or 200MHz 603e with 16k L1 cache in that Performa 6400 wasn't slow by any stretch, but it probably didn't have L2 cache. Coupled with the gradual transition to PPC native code of the OS and apps, these machines were often a little mismatched to expectations and realities of the code.
Meanwhile that PowerTower had a 604e with 32/32k L1 and 1MB L2 cache. That was a fast flier with a superscalar and out of order pipeline more comparable to the Pentium Pro and PII.
Consumers didn't grok cycle efficiency, pipeline depth, or branch prediction miss pipeline stall latency.