Niantic has finally Shown that Cargress is the intended way to play Ingress
Visited 3 new cities this past week. In the Pre Machina era, the best use of time when you come to a new city to play was to find a portal dense area park and walk, hack, link, field. Ideally you managed to find a hotel with a portal so you could farm keys to link back to when you go on your adventure.
But now with Machina, You've got so many km of portals to smash, with links crossing through dense areas so the only way to do fielding in a new city is to drive around smashing portals. Machina very much pushes Cargress as doing it walking is nearly impossible with portals throwing links 8+km long in all directions.
So I need to thank Niantic, as someone who always takes flack for Cargressing and trying to do it as little as possible, I no longer have any incentive to play out of my car.