What would one do, with faster hardware? I have a Mac Mini and I hardly have performance issues. The issues we do have are more or less software related (for example SMB).

If you can work and life with MorphOS 100% of the time, then new hardware can be nice if there is software that can use it. Even in Microsoftland, there is still software that can't use multiprocessor. Sure the scheduler can assign processes to cores but 4 processes using 1% of a core, isn't better than 1 core with 4% load.