Concurrent experiments are currently not supported.
Some devices/channels (e.g. TTLs, old non-Urukul DDS, Zotino) support monitoring and/or injection. This allows the dashboard to interact (read with monitoring and set with injection) directly with those channels, bypassing experiments running on the core device.
Implementing monitoring for sampler would be possible. The downside would be regular and not arbitrary conversions.
Implementing injection for Zotino or Urukul would be more involved.
For Fastino and Phaser monitoring and injection would be doable again.
The monitoring/injection api can also be accessed from the host (like the dashboard does). It's unclear how well that scales to many clients.