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We use Esri for rendering vector tiles and it works well.

Agreed. I can load with osm2pgsql on my home PC (AMD FX 8370, 32gb ram, 1tb SSD) in a couple of days, and that's generating 78 output layers. imposm is supposed to be faster still.

Why not use vector tiles? I can generate a vector tile package of the whole planet in Esri .vtpk format and it takes up around 30Gb. A map service can be published from it easily. Takes me about 2 days for initial translation and about 1 week ti generate the vtpk. Neither of these have been optimised for speed. I have an old Galaxy S3 upstairs running an app that displays this vtpk - so I can have the entire world down to house level on my phone.