Modern MAME sets (like version 0.250+) are massive. They can contain tens of thousands of files, weighing in at hundreds of gigabytes. They include obscure gambling machines, mechanical games, and prototypes that most casual gamers will never play.
Most pre-built Pandora's Box or DIY Raspberry Pi cabinets ship with a derivative of the MAME 0.78 set because it supports and dip-switch settings without lag. mame 078 rom set new
A full non-merged set of MAME 0.78 is roughly 13 to 15 GB compressed. Modern MAME sets (like version 0