Yes. I wonder about Second Life, which is doing a "cloud uplift" to AWS. The parts of the system that are variable-load and web-like are already on AWS. But the region servers (one CPU for each 256m^2) are owned outright, and in a colo in Phoenix. They're obsolete machines. But they are compute bound, with a constant load 24/7. Even when no user is in a region, the simulated world continues to run. Uses a bit less CPU, but the physics engine is still doing 45 cycles every second, and all scripted objects are still running. Leaves fall from the trees, plants grow, animals graze, trains run, whether or not any human is watching.

They think AWS will be cheaper. I hope they are right, but have doubts. Fortunately, they're doing this slowly and carefully, and if it turns out that AWS is too expensive, they should be able to move back or to elsewhere. Since what they're doing isn't even close to what AWS normally does, they're not that tied to AWS features.