I'm really glad to share my last work about μTCP, #unikernels, effects and #OCaml 5. I talk about TCP/IP, #GADTs, and some useful data-structures. https://blog.robur.coop/articles/utcp_and_effects.html
Robur's blog - μTCP, Miou and unikernels

My experiment about the TCP/IP stack, effects and unikernels