If you’re into playing guitar, (@ any level really) I’d say it’s worth it. I’ve been using these programs (powertab/tux/guitar pro) for too long to even remember, late 90s early 00’s , if I had to guess. Guitar pro 8 is pretty nice and the learning curve isn’t too steep. And yes, like someone mentioned you can export midi to daws for better vst/au backing tracks. Use it as a compositional tool/ use it in conjunction with a program like transcribe! for transcribing YouTube clips, etc. Lots of practice tools/chord/scale/arpeggio dictionaries.
Tons of free tabs available at ultimate guitar (although beware of the accuracy / some tweaking may be necessary)
So for $30 , I’d definitely recommend it