I use both in 7, and was always on in 6.
I usually turn them on when I am early game since on game 7-8 I still want to keep an eye on them as I balance choices, and then usually forget to turn them off after that, but then I notice and turn them off, then only toggling them back on when I want to check something.
I find the map surprisingly unreadable, with rough and certain (desert?) vegetated terrain not standing out. I’m mildly colorblind, but am not sure that’s the issue. I play close to a 22 inch monitor and have 20/20 corrected vision. Less related to yields, but I can’t for the life of me see most of the buildings as I play either and so am not getting any more accustomed to recognizing them by sight.
I use the mod that makes undeveloped tiles have smaller yield icons, which was a game changer for me, and is easier to see than what is developed.