For my taste the list of possible system-upgrades gets rather long later in the game, and I find myself mousing over the same Item again and again, just to realize each time it's the defense-upgrade I won't need on science-system back at the edge of my empire.

I would really love to be able to hide those techs on a per-system level, keeping the list clean and. This would also shave some seconds from searching a newly developed tech on every system.



An alternative would be filter-buttons to only show upgrades with an influence on Food/Industry/Science/Approval/Trade...



Am I alone with this?

No, you're not alone . That build box gets rather crowded when you've researched most of the trees.

The game needs more filter buttons in general^^

The screen is bigger than that box, perhaps a different graphical representation would be possible. Filtering would be nice, sorting would also be nice.