@ slygon
The main issue impairing 4.1 on Classics (and UAE) was that it could only support the Fast RAM on the Cyberstorm/Blizzard PPC, limiting it to 128MB or 256MB, respectively. With FE Update 1, now Zorro III RAM can be used as Fast RAM as well (e.g., ZorRAM, BigRAM). Since UAE can emulate Zorro III RAM, 4.1 under emulation should be a much better experience now.
Previously, Zorro III RAM could only be used as swap space.
