Welcome to Onto, btw.
I had a big old ICE barge up to last November. I think, generally, drivers saw little point in pushing it along.
I’ve always, since days long ago on powered two wheels, noticed a cohort of drivers happy to try and drive and push others in lower speed limits, 30s and 40s but then not do correspondingly above a NSL. Grown used to it.
Around West London there’s an infuriating number of roads now at 20mph limit. I think, whatever you drive, someone is going to know better - I got overtaken on Saturday on double white lines
And I now class that as “normal”. (I just set ACC to about 22 or even 23 and zen out…. 🧘♂)
I try not to speed, I might take the “liberty” of re-adjusting the displayed to actual or set ACC at up to +5%. But I spend a fair bit of time doing what I would have done on a motorbike. And that is extracting myself, one way or another from any other road user’s space if they look like they might want to have an accident.
Sometimes I pull over. Sometimes I put my foot down. I would often rather see a driver in front of me where I can better see their accident than if they’re testing my mirrors.
Of the most strange behaviour I had someone pushing me and then overtaking me the wrong side of a traffic island in a 40mph limit, only for them to be third or fourth in a line in the NSL behind cars and struggling overloaded van doing 60-ish (i.e. a good 16% BELOW the marked limit) a few hundred metres later. I had a clear line of sight and cruised passed all of them (obviously at the speed limit, although I was trying to recall what the display meant registering “two fat ladies”) … I didn’t see the other car (ICE Audi) again, even in my mirrors on that trip. And that was in the “humble” Ioniq…
There is one thing that now bugs me. And this is not at anyone personally around these parts, but if you are going to drive on a motorway or dual carriageway in the UK, just drive to the conditions.
All these cars are supremely capable as we know, so you can cruise at “70” with everyone else, and you don’t need to be dicing with tired, distracted HGVs who have enough on their plate already. Don’t talk to me about hyper-miling or any other crap. We’re moving to a world where we are taking electrons out of the sun, wind and water, and if conditions dictate just USE them 
[semi-rant over for today…. 🧘♂️]