Because popups are a pain in the backside, I don't see this being particularly useful and we have more than enough going on with avast.
I see but let me respectfully point out that for some others, that feature may not be a pain in the backside or any side for that matter.
Besides, the popup we are talking about wouldn't repeatedly appear. It would just appear once as the system loads.
There are many others that do not like popups, you only have to browse these forums to see that.
It appears once 'every time you boot' that becomes very repetitive/onerous. Then you have to consider this is yet another popup to add to the many others avast loads.
There are options that actually tell you if avast 'isn't running' - the Windows Security Centre - avast itself, Exclamation point or No-entry sign over the avast tray icon. If you don't see these it would be reasonable to assume avast is running without requiring any other confirmation.
As has been said avast have responded, we will have to wait to see if they implement it.