With such investments, I'd expect to not keep losing the connection between the phone and the headphones - but I do. They drop out frequently on my way to work, where my trusty Shure SE315s never do.

Also, Google seem to have done something terrible to their bluetooth stack since the upgrade to Oreo. My phone frequently soft resets whilst hooked up to Bluetooth (either my headphones, or my car - doesn't matter which). Again, not a problem when using the headphone jack.