This MUI4 for 68k is quite silly, because most of Amiga users have 68030 Amiga. 68060 Amigas are so expensive its not even funny. Vampire 600 V2 card might help here, but for AGA owners there is still no solution.
MUI 3.8 works very nicely on my A1200 68030 50MHz with 64MB RAM. MUI4 just tilts the machine and is so unstable its really painful. MUI4 on MorphOS is however fast.
Tried to run Ibrowse 2.4 with MUI4 on my A1200. Ibrowse gave only IBrowseNetwork System errors and AmIRC thought the stacksize is too low when its more than 32000. Everything is ok with maxtransfer on my SFS partitions et.
I dont get how MUI 3.8 can run fine, while MUI4 struggles so much? Sorry for beeing negative here, but the goal should not be to say WinUAE is minimal requirements.