I’ve noticed that, while Bitwarden will remember your setting change, it defaults to light mode when opened in a new environment.
As a frequent Incognito flyer, this has been a bit inconvenient. Having to decide between manually changing it when signed in or dealing with it stuck in light mode.
With system matching theme as an option, and most other apps starting to follow this so that users experience a seamless experience, I think it’s about time Bitwarden’s web vault also follows along with this. It would certainly make things nicer, and I know I’m not the only one who would want this. While many dark users may want this by default, I can recognize there are still some who prefer light mode. System matching should, in theory, satisfy both parties (I don’t know anyone that mixes modes outside of testing said modes).