Maybe ECS has gotten better, but when I used it a few years back it had a lot of rough edges, and wasn't really "simple" to use. On top of that, you're locking

Maybe ECS has gotten better, but when I used it a few years back it had a lot of rough edges, and wasn't really "simple" to use. On top of that, you're locking yourself into a single provider. A managed k8s service (all 3 big providers offer this) really isn't that much more complex, and has much better documentation / no vendor lock-in.