In the event that Apple disposes of iTunes, would you be able to at present buy and utilize an iTunes gift voucher?

Apple isn't disposing of iTunes. On the Mac, they're parting iTunes into 3 separate applications (for music, TV/video and web recordings) that together will have in no way different usefulness as iTunes, including the Apple Store Gift Card Balance, alongside adjusting your iPod/iPhone/iPad through the new OS. 

Apple says that iTunes will in any case be accessible as a "heritage" application, so think about those three applications as a different alternative to use rather than iTunes. Obviously, you'll have the option to utilize Apple Gift Card Balance in the iTunes Store on Mac, PC, iPhones, iPads and the iPod Touch. On the Mac, you'll have the option to utilize the iTunes Store either through the old iTunes application, or through one of the more current applications. 

Apple is separating iTunes in light of the fact that the program has become enlarged and inconvenient. Actually, I'm excited that Apple is separating iTunes, and I'll presumably update my Mac much sooner than I typically do. In any case, once more, you'll actually have the option to download and utilize iTunes if that is the thing that you like. (On the off chance that you don't move up to the up and coming macOS Catalina, at that point you won't have a decision - you'll need to utilize iTunes.)

In case you're utilizing Windows, you additionally must continue utilizing iTunes for now - Apple isn't separating the application for the present. I trust they'll in the end make the choice for isolated applications accessible on the PC, since I additionally use Windows a noteworthy bit of the time.