For django, they should really contribute to 2 scoops django cookie cutter program, so that you can get an out of the box django instance that can just deploy to Fly.io.
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If I were them I'd focus as many resources as possible on making the stack rock-solid, and away from acquiring more customers or adding more capabilities.
In fact I'd try to down-scope some features if at all possible, like the example they give of disabling app deploys while they're doing platform updates.
We use fly.io at a small scale and it's worked really well for us, but the money is in customers at a larger scale who must have 100% reliability.