agreed on this.

recently i start to rewrite a core part of one of my iOS VPN app to rust, which previously use fd.io vpp as it's networking core, the original vpp port is 1.5 years ago manually by myself, given i know a lot about how the vpp does and how vpp coroutine and runtime scheduling works.

the rewrite is in good shape and solve many issues such as pre allocated memory heap using mmap apis and some scheduling issue of back2back tcp session terminated in the vpp host stack.

also by addressing the issus, i am now can easily integrated tailscale as a addon interface for moving in/out l3 packets between tailscale and the core.

All those i think cannot be done easily without domain knowledge about those networking and system stuffs.