By https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes, it is recommended to increase buffer sizes in the kernel.

This should help boosting performance on tools using QUIC for communication, e.g. HTTP/3 connections or Cloudflare tunnels, which will probably become even more mainstream in the near future.

As discussed in the digitalocean-k8s slack channel, a current workaround for users is creating a daemonset and alter the worker nodes to support this.