Comment by aligundogdu

That 10k limit was the breaking point for me too. I decided to move our stack to Matrix/Synapse but didn't want to lose years of context. Since I couldn't find a straightforward migration path, I built a CLI tool to handle the transition (users, channels, and history). It’s open-source if you want to give it a try or contribute: https://github.com/aligundogdu/matrixmigrate