This is great. I've been wondering how to do this, and this is exactly what I had come up with. I'm glad to have confirmation that it's the normal way people do

This is great. I've been wondering how to do this, and this is exactly what I had come up with. I'm glad to have confirmation that it's the normal way people do zero-downtime migrations. I might add one change. You say add a column migration, ship it, then add the feature that uses the column and ship again. I was planning on shipping the code at the same time (or even before) the migration, but having the feature disabled with a feature-flipper until the migration is done.