Migrate from Dendrite to Synapse

*This issue was originally created by [**@bahuma20**](https://github.com/bahuma20) at .*

As the Dendrite project is currently orientating for a different use case i want to switch back to Synapse as it has more features and is more stable.

Is that possible?

I have a single-user instance and i am fine with loosing all my old chats (so no migration of those needed, i will just re-join groups on synapse later)

The only thing that i want is to not lock out of my domain and keep my username.

Can i just use the same private key for synapse then? Or are there other things to consider?

No files, tests, or entry points are identified in the issue. First clarify whether this is an implementation request or a migration-support question, then document the supported path for replacing Dendrite with Synapse while retaining the domain and username; completion needs explicit migration and data-loss criteria.

Written by the indexing model from the issue text.