Is it a good idea to purge old Rails migration files?

Question

I have been running a big Rails application for over 2 years and, day by day, my ActiveRecord migration folder has been growing up to over 150 files.

There are very

Answer 1

I occasionally purge all migrations, which have already been applied in production and I see at least 2 reasons for this:

1. More manageable folder. It is easier to spot if some new migration is added.
2. Cleaner text search results (Global text search within a project does not lead to tons of useless matches because of old migration, say, when someone created some column 3 years ago).