The worst problem is the memory reserved that is never going to be used.
If we truly need so many GUI objects that it becomes worth to implement is questionable, but it would not be too bad to construct the GUI pages with the exact amount wanted when loading the GUI page, before validation.
Can be reopened once we have a precedent for so many GUI objects that the memory matters.
4096 observers are unlikely to require repeated GUI elements, number of players is probably to be capped at 256 if we don't make this an MMORPG. Also if we have so many players, it is unlikely that a user will be able to scroll through 256 objects and instead would work with grouping (like entity selection).
