If you bought a brand new car, the loss of warranty is not worth not bringing it to the dealer. If you have a car already out of warranty then absolutely, service it anywhere else. But we have an EV and the 8 year warranty on the battery is also dependent on servicing the car within the dealer network, so we're in a bind for a while.

And yes, I know that legally you don't have to service the car at the official dealer to maintain the warranty(at least in the EU/UK). The problem is that even if that's legally true, dealers will always try to weasel their way out of it. The service can be done at any VAT registered garage, but it has to be done using the exact compontents advised by the manufacturer and as advised by them - so if your garage gives you an invoice for "engine oil" you're screwed, it has to say "engine oil 5W20 SAE23531" or whatever is officially advised. Same for every other item or your service is invalid. And even if you do everything exactly as described, the dealer will just reject your warranty claim because you didn't service the car with them, then you have to take them to small claims court and you will almost certainly win, but it's time and effort. So as always, the law says one thing, and in practice things aren't that simple.

>>That's also why you don't install these little trackers to find your car when it gets stolen

Certain cars are impossible to insure without a tracker. And if you're a new and young driver good luck finding any policy that will insure you without a tracker. It's not always about convenience.