Looks like a lot of schema migration talk here. Out of curiosity does anyone have production experience with lazy migrations for serialized data? Where your mod

Looks like a lot of schema migration talk here. Out of curiosity does anyone have production experience with lazy migrations for serialized data? Where your model migrations exist as code: an array of functions that convert one version of the model schema to the next. The schema version is encoded into the data. The migrations are lazy because the model is fast forwarded its latest version at the last possible moment, when the code reads the serialized model. I know Braintree does this with Riak. Anyone else?