Yes yes yes. In my experience in Enterprise Dev teams it seems to be way too common that people just don't version control their DB schema, or use tools to prod

Yes yes yes. In my experience in Enterprise Dev teams it seems to be way too common that people just don't version control their DB schema, or use tools to produce schema diffs between dev and prod to product upgrade scripts, all driven by using GUI's to create their tables and then exporting the DDL using a tool (eg TOAD if you are doing Oracle work). A few years back, I built an installer in Ruby to apply 'plsql modules' to an Oracle database. This was a massive project with > 100 developers at this point and probably heading toward 1M lines of code. My migrations table worked on modules, so there were a set of migrations per application area, but it was really just an extension of this idea (and I borrowed the idea from Rails too)!