[magicalhippo]

We have automated updates of schema. Installs are on-prem, and we support running multiple versions of our program at the same time (if there's a bug in new version, just use previous as workaround).

We rarely drop columns due to this, but haven't found it to be a huge issue. If we need to, we'll wait until the last supported version that has the column in its schema is retired. Then we'll add an explicit "drop column" to our schema file for the next version.