MongoDB timeseries change stream support or any alternative

Hi @kevinadi, Thanks for update on the change streams
But any timeline that this feature will be implemented?
As of now to simulate change streams we are calling API at regular intervals which gets latest data received from IoT devices and we have like already more than 500+ devices sending data and we need latest data to updated on UI, and this is creating too much load on servers so any suggestions on how to improve without change streams