What does stopping a Canvas not impact?

Stopping a Canvas primarily affects the current flow of interactions within that Canvas. It does not impact users who are next in line for message reception, meaning those users will not experience an interruption and can still receive messages as intended. The message reception for these users is queued and managed by the system independent of the Canvas status.

On the other hand, stopping the Canvas does affect users currently entering the Canvas, as they would not be able to interact with it until it is restarted. Additionally, any queues already in the system could be impacted if the stopping of the Canvas alters the expected flow of messages. Future user entries would also be restricted while the Canvas is stopped, meaning any new users would not be able to access the outputs of the Canvas until it resumes operation. Thus, the choice correctly highlights that the users next in line for message reception remain unaffected during the stoppage.