It hasn't been abandoned for so long. The developer was planning not to update it in June. That's only 2 months ago and as I said earlier, the reason was the plugin was so good the developers tried to mainstream it around stepping 26. Regrettably, they didn't really understand what it was being used for and didn't include sound in the main branch version nor multiple outputs, so in fact the official replacement was not a functional replacement, only a partial one. However, its creation undermined the rationale for updating the plugin the developer had developed. I tried making the point at the time but because the plugin still worked, it wasn't deemed sufficiently important to restore the missing functionality in the core software.
The effect of updating to the new QT had been to break the functionality still supported by the old plugin and that means the user community who depended on that it can't update beyond 27, at least not until the situation changes.