Main view of the base:
I like that
Demo.Graph mentionned programming, because a zoomed out Factorio base looks eerily similar to a circuit chip.
The little red and beige dots you can see around the mininng outposts are the legacy laser turret bunkers I placed there before making the defensive outposts you saw previously, there just isn't any real need to go and deconstruct them.
The main train station:
There is enough parking space there for a second train to wait in, but not enough for a third or more, so not really scaleable. Adding more parking slots to each station would be possible, but just barely. Even then, it wouldn't be really useful, because....
Smelting array, science station, main bus:
Look at this main spaghetti-magnificience bus. It just doesn't have enough space to handle more throughput, so bringing in more ore from the train station would be pointless. As a result I've had to bring in copper and iron at weird and random points of the bus just to maintain productivity.
Also note how small the science array is, it can't even process all the space science packs I'm producing and I've had to stop rocket launches because of it.
Additional circuit array:
Here is one of the input plug-ins I mentionned. These two green circuits arrays are barely enough to feed the modules and blue circuits facilities, and they even manage to use more copper plates than my off-site facility can produce (although that easily fixable) resulting in them stopping and starting as they wait for the train to bring in more copper plates. I was really taken aback by just how much faster the assemblers mark 3 produce, they're consuming more than a fully tapped 8M copper mine can output! Even then, if I was to fix that I just don't have the space to bring in more plastic due to not having enough space for another plastic belt.
Finally, the uranium processing facility:
At least with that one I went massively overkill. This is feeding 12 nuclear reactors (two 2x3 arrays) and is still massively overproducing U-238 with just three koverex-enrichment centrifuges. At least I can ploink down more nuclear plants pretty much at will. Yes, those are three full chests of U-238.