Deleting old migrations

[nimmolo]

"max", a Rails guy on Stack Overflow with a very high reputation, recently offered this advice about trying to avoid frivolous migrations. He said:

"Frivolous" migrations are less of a problem than you would think if you're actually using migrations correctly. They are only intended to live in the codebase until they have been run across environments. After that they should be deleted.

This sounds right to me, I've always wondered about the usefulness of long-obsolete migrations. Shall we delete our old migrations?