Ohh this makes sense now. Firecracker is good for compute related workflows but gvisor is more good for GPU related workflows, gotcha.

For my use cases usually, its Firecracker but I can now see why company like Modal would use gvisor because they focus a lot (and I mean a lot) on providing gpu access. I think that its one of their largest selling points or one of them, for them compute is secondary customer and gvisor's compute performance hit is a well worth trade off for them

Thanks for trying to explain the situation!