I don’t think it is good/bad.

More, what is better for this specific project at this point in time given the objectives…it’s just an engineering judgement.

WXwidgits got Audacity through twenty odd years of intense development and helped millions of users.

having worked with wxwidgets only a tiny bit, things simply don't look or even work the same across operating systems with wxwidgets. It tries to use native widgets wherever possible, but that also means things behave slightly differently across systems, and if the toolkit doesn't provide a matching widget, it sometimes just uses the next best thing. All this also makes it rather hard to style things in a way that looks good. It's good for simple applications but you run into the limitations quickly if you actually try to use it cross-platform in my limited experience.