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So the thing I've heard from dtrace people is that eBPF still is not really "there". I've never gotten a clear answer about _why_ this is the case, though I feel like there was implications that, basically, eBPF programs are brittle/don't actually capture everything well?

Would love to hear more details on that front.

Why would this help with games?

They generally have a very latency sensitive input/rendering loop. Performance analysis can be challenging, but with the right tools it can be much easier.

The thing that we need in order for your dream to become a reality is excellent user space frameworks, so I encourage you (and anyone else) to go build one or (better) find one you like and contribute.