This specific version is famous because it strikes a perfect balance between accuracy and performance on low-to-mid-tier hardware (like older Android devices or single-board computers).
If you have a verified MAME 0.159 set, and you want to update to MAME 0.160 later, you don't need to download the whole set again. You can download a "Rollback" set (a set of files removed or changed between versions) and rebuild your new set. However, for MAME 2014, usually, a fresh download of the specific 0.159 set is easier for most users. mame 2014 reference set mame 0159 roms chds verified
