At least in Cities Skylines 1&2, where the player has a good overview of the behavior, they only work for low to medium amount of traffic. If you have one side sending in cars constantly, the others never get an opportunity to enter the roundabout, so there’s a traffic jam spanning through the whole city behind it.
I'm a programmer and I need three screens to work effectively (otherwise I get into 8+ virtual desktops). However, I'm using a Minisforum UM790 Pro and not a laptop, because what’s the point in having another screen I don’t use and a keyboard that’s awful.
The problem with that approach is that just finding a scapegoat doesn’t solve the issue. The Brits and the EU still have to live with the consequences.
The proper way to address this is to analyze what happened and make sure that it will never happen again. If the result of that analysis is that voters are fucking idiots, we somehow have to alleviate that.
One thing that's very apparent is that with more traffic the simulation slows down while the framerate isn't (so all cars go in slow motion, even though I'm at 3x speed). This means that it's severely CPU-limited.
I don't know how multithreaded their simulation is, I have a 5950X with 32 hardware threads. Maybe an upgrade to the new generation of Ryzen CPUs that are going to come out around February could help.
They’d still see that they’re using Signal, which is probably good enough for the whip.