As far as I known from the client side experience, Arndt probably chose good time threshold 7 days, having updates daily 1-7 days old.
As on client side, processing of older incremental data can be slower than downloading the full file even at throttled speed of BRouter application.( even on Xiaomi MI A2 6 GB RAM and 8 cores.)
But this processing speed issue is rather inconvenience solely of the BRouter application, than must be running foreground with display on. ( my script can run on background )
The server side optimum may be a different case, though.
I suppose there will be nonWiFi download limitation/warning.
Sent from my Xiaomi MI A2 / Android 10, via Tapatalk