> > > Yeah T7Z way better. > > > > It is for MAME ROMs and Software Lists ROMs it's just that very few people know how > > to deal with it, but luckily, I know how. > > No it isn’t. The format is slower to perform most operations on. You’re better off > with split zip if you’re doing any real development work.
To this day I still use .7z and merged sets for all my release set ROMs. I've never needed to perform any operations on them that are noticeably slower. I guess I've just not done any 'real development work' on MAME in the last decade or something.
For whatever the nature of the work I do is I've found having the release sets in .7z to make the workflow / personal organization easier as I know the folder full of .7z is the archival folder, where I don't need to be changing anything, and don't want to be accidentally adding / removing anything from the archives.
For day-to-day work, MAME being able to work with the common formats people send me files to look at in is also a great timesaver, for both me and them.