There are two things I'd like to point out here:
First, at least in the Stadia OpenDev, the cap of Quarters (IIRC it looks like tied to population numbers) is removed. This cap will be very likely return in the full release, and one will be not that likely to cover a territory with a carpet of Quarters in the full release.
Second,
Humankind has an interesting type of yield modifier that can be called "City Adjacency Multiplier". There is an Ancient Era city infrastructure called
Forge, and a Medieval city infrastructure called
High Furnace -
both can "+1 industry to Makers Quarter when it is
next to anther Makers Quarter". If one builds a "Quarter Triangle" of Marker Quarter, the Forge and High Furnace can significantly increase the output of Markers Quarter without having more Quarters.
I suppose later Eras will also have similar "adjacency multipliers" for Quarters, and they can make every (clustered) Quarter into a high output powerhouse. I think this is
Humankind's answer of the Tall playstyle - instead of
more Quarters for more exploitation output, one can have
better Quarters for more adjacency output.