Because each game's ZIP file is a self-contained unit, you can copy, move, or share individual games without worrying about breaking anything. As the official MAME documentation notes, "A non-merged set is... a good way to go if you want to have very few sets and want everything self-contained and easy to work with". If you only want to play a handful of classic games, you can simply pick their ZIP files from a non-merged set, drop them into your MAME roms folder, and they will just work.
2. Perfect for Frontends (LaunchBox, Hyperspin, Attract-Mode) non merged mame rom set
Ultimately, the best MAME experience is the one that gets you playing games faster. For many, that’s Non-Merged. For purists, it’s Split. But never use Fully Merged unless you enjoy pain. Because each game's ZIP file is a self-contained
If a game fails to load in a non-merged set, you know the issue lies entirely within that single zip file. You do not have to waste hours auditing parent-clone relationships or hunting down missing bios/parent dependencies across your directories. The One Major Catch: Storage Space If you only want to play a handful
What are you planning to emulate on? (e.g., PC, Raspberry Pi, Steam Deck)