As far as I am aware Bose QC's require either manually disconnecting from the current device, or using the Bose app to switch to another device, awful. Way longer than "2 seconds", and doing this 10 times a day across 2 or 3 devices is a joke.
Nobody who understands what they're buying should ever consider bluetooth headphones if amazing sound quality is a top priority, because the quality gap between the best bluetooth and a decent wired set with high quality audio source is substantial.
You know LDAC is basically a marketing gimmick right? It's not supported on Mac, Windows, iOS, 99.999999999999% of consumer devices. Android phones support it but not even by default, you have to know to go through some hidden menu and enable developer mode or something first. There isn't even such thing as a bluetooth dongle with LDAC support, and probably never will be. Even if there was, who would want to add a dongle to all their devices just for slightly better bluetooth audio. LDAC is also not possible when using multi device connections. How is that a reason to drop H1 convenience?