The worst example are my wireless headphones. When I get into the car the car radio tries to connect to my phone, so it stops the wireless headphone output. I then have to scroll through the menu and disconnect the car radio, which tries to reconnect after a while.
But that is not even the worst. If I have an audiobook playing while I connect the headphones the audio switches immediately to the headphones as soon as they are connected (which is the expected behavior). But if I start the audiobook after the headphones are connected it takes several minutes until I can actually hear something and I have not figured out a way to speed this up apart from disconnecting and reconnecting after I hit play.
I for one love my wired headsets, they just work. But I have to buy some new ones every other month because I regulary rip them when they get caught up in something.