But picking at that a bit, if I were to run a simple off-the-shelf Django setup against MySQL, I'd use GAE (if not Standard than certainly Flexible). My code wouldn't be any different than deploying it to a raw VM, so I'm not locked in and could deploy it on DO, AWS or anywhere else in a heartbeat. In the meantime, I don't have to deal with setting up load balancing, autoscaling, DNS per module, etc. so I get some real value from that.

Is your concern the lock-in from the code standpoint, or operational "lock-in" that once you've got all this set up for you, you'd have to go replicate it to get out? If the latter, aren't you saying you're going to do that on Day 1 in the "avoid PaaS" case?