Hey, I was thinking, wouldn’t the appearance of Audacity bring you to use it more if it didn’t look like something you’d use over 10 years ago…? I mean, it wouldn’t take much effort to fix up the looks, not that I could do it, but someone who knows how to do it could easily make it look presentable, just an idea which could bring many more people to use Audacity. 
This has been discussed many times over the years - there used to be ann experimental facilty in some of the early 1.3 Betas for “Themes” to facilitate customization, but this was withdrawn a while back. IIRC it’s still buried somewher in the code.
Most of us users are concerned with how Audacity sounds rather than how it looks - and in fact a lot of us actually like the quaint slightly old-fashioned look, It’s like a comfortable old pair of Levi’s 501s…
Personally I really don’t want the devs wasting time of flashy new graphics and branding - there are far more important projects to work on - look at the list of proposals and feature requests on the Wiki.
WC
See Audacity Themes