PPC is NOT bad. Only PC people ever think in Mhz because M$ Windoze is so $#@! they need as fast a CPU as possible to make it work right.
OS3.9 loads faster than Windows no matter what you have in the startup-sequence and what programs are loading at startup, even with a ton of hacks it loads within seconds. Windows does not load within seconds even after a fresh install.
Windows needs tons of Mhz, OS4 needs any cpu at any speed.