A lot of web apps are just well-enough served with a blue-green deployment model. It is less risky.
But if you really need it, it's really great to have that option (e.g. very long running systems which are split in front/back etc), and it can be used in creative ways too (like the Drone example).
Great talk, thanks, nice to see other creative uses. Great idea to add LiveView and SVGs for the keyboard UI.
"…thanks to hot reloading, which — for once — is useful…"
That seems to sum up the sentiment that hot swapping in Erlang has uses but they're generally not aligned with what Erlang is typically employed for. It seems like it would be great for tight game dev loop feedback and iteration too, for example, but that's not a traditional use of Erlang either.
But if you really need it, it's really great to have that option (e.g. very long running systems which are split in front/back etc), and it can be used in creative ways too (like the Drone example).
Here is a lightning talk I gave about how to use hot-reload for music / MIDI interactions: https://www.youtube.com/watch?v=Z8sGQM6kLvo