I too used V-Vocal for many years and was reluctant to switch. IMHO if you don't take stability issues into account, V-Vocal is a more capable program than Melodyne Essential. However, Melodyne Editor is superior to V-Vocal in multiple ways; I still have V-Vocal on my system, but haven't used it once since upgrading to Melodyne Editor. One issue is that V-Vocal came "free" (well not really, there were licensing fees passed along to the consumer) while Editor is a paid upgrade (typically $150).
However, this is all moot because V-Vocal is a 32-bit
[not correct - see next post] DirectX plug-in, a standard which Microsoft seems to have lost all interest in years ago. Although some companies, like Cakewalk and Sony, still support DirectX many (if not most) hosts have dropped support. It is a zombie format; fortunately, Cakewalk has VST versions of the stalwart Sonitus effects in case Windows 11 or 12 or whatever can't deal with DirectX any more.
Roland, which owns the V-Vocal intellectual property, has no plans I know of to update the software (which has remained unchanged for IIRC around eight years). If Cakewalk bought those rights and committed the resources to re-write V-Vocal from scratch as a VST plug-in optimized for 64-bit systems, I would not be surprised if amortizing that expense would add more to the cost of Sonar than an upgrade to Melodyne Editor. Furthermore, pitch correction is not a unique feature. Consumers can choose from Antares, Waves, iZotope, Melodyne, and others. It would make little sense to spend time developing something equal to the capabilities of those programs instead of developing unique Sonar features.