> Existing ROMs don't change I think this is not exact, as, if memory serves me well, I had breakages with existing romsets when upgrading MAME. While a romse

> Existing ROMs don't change I think this is not exact, as, if memory serves me well, I had breakages with existing romsets when upgrading MAME. While a romset itself may not change, another one may take the place of the default set, and the previous gets renamed, so it requires manual intervention. I used to play with MAME games - not hundreds, but I think a few tens, and the hassle of upgrading was never worth, with I think only one case where upgrade was required. So, YMMV. My suggestion for casual users is that if one has a given set of favourite ROMs, and they work, there's no reason to upgrade.