Why "Open links in a new tab setting in UI" is not getting merged?

That doesn't work for mobile users.

i.e. majority of the userbase.

Btw I am using this userscript so it's not a problem that affects me personally. However I believe the default Lemmy experience should be as user friendly as possible.

No, that's the backend part of the same pr. We still need this setting in ui to actually use this feature.