I know that the LinkBuds (Open) are not popular, but I'm happy with them regarding the usage I give them. Don't expect spectacular sound (they definitely don't have that), but the open back (doughnut) makes them perfect for a ton of use-cases.
When mine die, I'll certainly get these again.
For noise cancelling (trains, airplanes, etc.) I already have the XM4, and for plugging headphones into decent hardware I have the DT 990 PRO.
So different headphones for different needs! Glad to see that they didn't discontinue the LinkBuds Open.