Today, it runs much better than Linux on that hardware.
Cool but why? Isn't the software platform the sole point of Amiga?
For some people, when you are not taking over the whole machine (as you would do in demos and games), then replacing the OS with something that gives you memory protections and virtual memory, uses all ram for caches, talks ipv6 and things like that is kind of neat. It will be a somewhat slow unix box, but it is still that same machine doing both kinds of tasks for you.