I don't think we had disagreement on that, but we don't seem to agree (at least partially) on what's the best way to do that and whether the same mechanism should also cover other sources of modifiers (such as traditions).
Heh, it seems like we can't agree even on what we agree.
It looks like we already agreed on most of the relevant UI improvements already:
having UI that could show all possible sources of a specified modifier
Well, as I said previously, this is supposed to work together with the search bar.
Or even better, using nested tooltips, when you hover over a modifier in the info tooltip, it could automatically search for that modifier, highlighting the exact inventions which gives them.
In practice, better UI would be to display the list from UI where it would apply. So for cities, when hovering over the "found the city" button one would get a tooltip listing various sources of cost reduction.
But really, the point of the thread before this massive derailment was on arguing for either images in the OP.
The second one I figured would be quite controversial, and it was, so it isn't hard to make peace with the disagreements.
The first one though, seems to have no controversies, and no reasons for it, as it changes absolutely nothing for anyone who doesn't feel like it's helpful, it's merely a visual aid.
That same visual aid and other ones could surely be implemented in other places, that's something I definitely agree on, but would still argue that inventions simply needs it the most.