I have another problem with bluetooth - sharing. With a cable you always know the device is connected to you and you only. With bt, another person's device can overtake your audio even if they don't mean to. They were paired once and now simple notification sound can take over your bluetooth speaker. These invisible connections from multiple devices are hard to track and often cause problems.
I find bluetooth sharing to be a feature. I can make my headphones enumerate which devices they are connected to. They can also connect to both my computer and my phone simultaneously, so I can be using the computer audio mostly and have my phone override the audio input/output when a call comes in.
Most of my problems are with JBL Charge 4, which I often share with friends. Multiple phones get paired and connected during a day. Notifications definitely can stop currently played music from another phone in this case.
