Hmmmm... I found the current 32 bit Apple App and the other mentioned in the article.

DVD Player 5.8 is the only current Apple App that's still 32 bit. QT 10 can play DVDs so it will be interesting to see if Apple either updates DVD Player (doubtful) or builds its ease of use into QT 10. Perhaps they'll call it QuickTime 11? I hope they do one or the other as DVD Player is a slick little application.

QuickTime 7.6.6 lost some of its functionality in High Sierra so it can't really be called a current app. It's been an optional install since OS 10.6 so no surprises there. Other than a few of the extra functions that the Pro version allowed, I have no idea what/if QT 7 can do that QT 10 won't so that won't get an upgrade. I've been expecting 7 to go away since that was first announced in Mavericks. As for the QT Pro, those conversion/export features are nice but a) they can be performed in iTunes or QT 10 (but not as easily) and b) they only work on one file at a time. Fortunately, there are inexpensive apps that do batch processing. Interestingly, QT 7.7 was the last update for OS 10.5—it hasn't worked since and should be trashed if still present in the Applications Folder. QT 7.6.6 can still be downloaded from Apple and installs in the Utilities Folder only. If you haven't needed it before, don't bother as QT 10 or iTunes can do anything it could.
QT 7.6.6 download

Three years ago, I was panicking that QT 7 Pro was going away — now I won't miss it thanks to other apps I have. In fact, I had no idea it was no longer fully functional till just now. Apple stopped selling new licenses years ago and worse, wiped our license info from out User Accounts when the transition to The App Store was complete. Fortunately, I'd made a screen shot of my $29.95 QT 6 Pro license and these are still forward compatible w/ QT 7.6.6. There never was a Pro version of QT 10.

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