> Adding a zoomlevel adds 4 tiles for each tile in the previous zoomlevel.
> You'll go from 91 billion tiles to 366 billion.
> This meaning you need 4 times the load to generate, 4 times the storage to
> hold them, 4 times the traffic to display them.
Mathematically speaking is true, but maybe is not true in real world.
I have seen a lot of times people not using the last level of zoom
(how many times you have to see a whole road or even more then one
road? ) therefore the traffic will not be 4 times more. Also, even
considering '4 times more' as true, we have to consider that is only 4
times more the traffic generated by the zoom level 18, not the whole
OSM traffic.
I think it would very important to know the actual saturation of
processors, hd and traffic to be able to give a though point of view
over adding a new zoom level.

my two cents,
Fabio
-- 
Fabio Alessandro Locati

Home: Segrate, Milan, Italy (GMT +1)
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