I have a 2020 Canyon Endurace with Shimanio Di2. I also added Garmin Vector pedals with built in power meters, and a Garmin edge bike computer.

I think all in my bike has around 11 devices on it with updatable firmware… And I might even be missing a few.

Both pedals, front and rear derailers, Di2 battery, Di2 Bluetooth adapter, Di2 Hub, both shift levers, Garmin computer, front wheel speed sensor.

And I often wear a Garmin heart rate strap, so that’s another.