Hello,
the management of several update regions was introduced to reduce the necessary update areas to a minimum. However, in order to reduce the overhead that is caused by comparing several areas and by building unions - the number of update areas have to be limited.
The number of update areas was choosen as a kind of trade-off or best compromise and it is not configurable.
If you have many different widgets that will change their content, it is no problem to update them with the current setting - at the end the entire screen update will be synchronized by the display sync.
Best regards,
Manfred.