I think Digiman is just attempting to out troll Jorkany & Talemehomegrandma. It takes some effort to pull that off and still appear serious.
Unless you want to play PowerPC type high speed Amiga games like Wipeout, Quake etc don't bother.
With MorphOS you have a mediocre OS that has nothing to do with real Amigas running on a Mac
With OS 4 you have a semi-official update to OS 3.x running on expensive underwhelming white elephant of a computer.
Both need UAE emulator to enjoy anything worth doing and none of them can play real Amiga games from disks. So save you cash, tweak UAE and forget all the fake Amiga stuff. No Paula chip = not Amiga....just another emulator.
For watching movie files, browsing the net, streaming content, instant messaging.....just get a Linux/OSX/Windows machine and don't kid yourself into blowing cash on fake Amigas. That's what sane Amiga lovers do 