I'm personally interested in Minimig because of the ability to load adfs from flash media. This makes it's easy to shift them from your computer to Minimig. I don't think that's actually possible to do on a stock A500. So, you're limited to sourcing second-hand games which could be something of a lottery as time ain't kind to floppies.
And, of course, the Amiga itself could die. Some Amigas are over twenty years old at this point!
However, Minimig is not, and may never be a consumer-oriented item. There is also Clone-A in the works, which may turn out to be a better solution for those of us who aren't electrical engineers.
I found my limit was modding my saturn...