Congratulations on the 10 year anniversary. Having used Traefik for multiple years in a large Micro-Service Setup (200+ services) I must say I have made mixed experiences. If your requirements match the very opinionated way Traefik does things then it's great. But as soon as they don't you're going to have a hard time getting things to work. That's why shortly after migrating to Traefik I started to maintain an internal fork to add support for unique request ID headers which I maintained for two years until we migrated to HaProxy. The GitHub issue I opened for this in 2019 is still open.

To be fair I used Traefik back when it was still version 1.7 so maybe things have improved by now.