I once wrote an article about this topic for Steinberg. I think there might be a part 2 somewhere as well.
It all depends what you are doing and what you need. For me, WaveLab Elements falls a little short but for the current sale price of WaveLab Pro, it’s an absolute no-brainer to buy it if you’re thinking about it. You can demo it first as well.
Any DAW can process stereo audio but WaveLab is a really special vehicle for mastering, sound design, certain post-production tasks, and other things.
For me, there are things I do many times per day in WaveLab Pro that DAWs like Cubase or Pro Tools factually cannot do.