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The idea behind the "serverless" approach is a lightweight process which doesn't spend any measurable CPU / memory (at least for healthchecks). GitHub Actions is the opposite of that. After all, cloud is someone else's computer - in this case, several other projects can use this computer for something more important than health checks.

They've only recently started playing nice with open source and developers. I doubt they'll do anything to jeopardise that.

Tensorflow can work with ROCM which is equivalent to Nvidia's CUDA.

The watch thing is just Spotify not working on it anymore. They're focusing on their iPhone app and it's their decision. Pandora has a Watch app and the APIs allowed them to background play since Day 1.

Apple TV+ came much after Netflix and Prime Video. Are you saying Apple harmed them post TV+ release?

Messages, Music, Calendar etc, all have their own counterparts and I don't recall any history of Apple hurting them!