Yes I am a slow builder because my colony is purely a game of patience. I would much rather have more than enough but take long to build than have just enough. Also, I always start my world's as medium sized to boost performance. Once I'm advanced enough to need less of the Rogers and am running out of space, i sell the unnecessary rovers and expand
With the new regions feature, this issue has now partially been resolved. You will need way more bots in order to build up each city, but only the bots in the city that you are currently in will be active and impact performance, while you may have thousands of rovers spread across many cities. most will remain inactive and will not impact performance until you switch to their city. So you only need to consider how many bots each individual city has instead of the total amount that the region has. Another good thing about this is that all cities share all resources, so it's not like each city has to build the same number and types of buildings. You could have a city devoted to storing certain resources, a city containing all of your alum gens, a city for water generation, yet another for food generation, and they would all share with each other and only have rovers specific to their needs.
Jax is still right though, rovers don't continue to gather resources while their city is inactive, so if you rely on rovers for resource production in your cities, none of the inactive cities will contribute to the resource production rates. Because of this, you want to move to auto-producing every resource as soon as possible so that they will contribute to your production rates even while the city is inactive. Besides, no late gamer should have to have hundreds of mining bots laying around, chop those things up and get more resource generators.