The only counterargument I can make is that the developers refuse to put it on Steam until it's ready so you need to use some sketchy 90s era payment site to buy a copy. Or just grab a key from the forums.
The sealiesoftware implementation is I believe a 68k emulator - and since many AfterDark modules back then did direct frame buffer access, the number of toolbox traps that would need to be implemented could well be quite small.
However, right now it doesn't seem to run that well. I'm getting estimated framerates of around 5 fps on a M3 Macbook Pro, making it essentially unplayable.
I don't see any other comments about the performance - am I the only one?