Is it 'better' to use mysql_dsn rather than mysql_ram_disk with buildkit and amp config?
It's a little bit hard to answer without more info but generally the ram disk isn't going to save your data unless you do something extra, so it's more useful for one-off tests or something where you need speed over permanence, like running unit tests (which it mentions in the readme). I don't use buildkit since I'm on windows but I do switch over to a ramdisk when running tests since it's way faster when it keeps needing to load/reset the database. I wouldn't recommend a ramdisk for setting up a semi-permanent dev environment that you plan to work on regularly, unless you're willing to regularly dump the data somewhere and reload it later, or automate that at startup/shutdown, and risk losing something in the middle.