I don’t feel that continuous recording is necessary, especially in the application and service that Alfred provides. This is not a mission-critical service, and I may ruffle some feathers here - Alfred is free (or low-cost).
One thing I wish that Alfred did have, and is kinda close on this topic of continuous recording and motion detection triggered recording, is video from before the motion sense activation, maybe 1-3 seconds then the period that triggers the motion detection. I’ve found that the application lags a little bit (again, between 1-3 seconds depending on ambient lighting) before detection is triggered. Example here: https://alfred.camera/tv/EkDDHU50Z (Sony Xperia Z3 on the rear camera)
Otherwise, motion detection triggered recording is more than enough for most anyone’s consumer needs.