The problem is that there are a couple of emulators. Petunia on OS 4 will run non-hardware-banging software using native Picasso 96 video and AHI audio with its JIT compiler. Trance on MorphOS does the same thing but with CyberGFX video. EUAE actually emulates the chipset but doesn't have a PowerPC JIT compiler for the processor.
Petunia is not GPL like the rest of EUAE. That prevents the JIT compiler from being used with the chipset emulation. Since the new hardware will have a multithreaded sidekick chip, I'd expect new chipset emulation to be released for it eventually.