@cgutjahr
Either your definition of "not much memory left" is quite different than mine or OS4 is a resource-eater compared to the competion.
MOS1.4 with JIT, and all standart eyecandy eats just 29MB out the 128 on my Peg1, and I can't remember ever running out of RAM on this baby (except when I tried to unarc big archives into RAM: offcourse :oops: ). And it was mainly used for developing.
Also note that PPC code maybe twice as big, the data your are handling is still the same size, and even the most advanced Amiga-apps will stay quite a way from having 20MB or so in exe-files :-P
64MB should leave you with ~30MB free, which should be enough for standard tasks.