Latest updates have broken the Edge, I suspect the next update will reduce the battery life greatly. Then after the dust settles they will release the 540.
This has been the Garmin way for 10 years.
I'm not going to do any more updates, mine works after rolling the firmware back to 9.1
That will do for me.
I will use mine until the Edge 550 has been out for a year and out of beta.