Ok so here's an update, at least in my testing, the Sonata Sherpa synthesizer refuses to load after stalling for a long period of time and nearly crashing NVDA. Either the thing is bugged, or I have conflicting addons installed. Of course, it could very well be the latter, since I installed the Dengjen Neural Voices addon (a revival of the piper-only NVDA addon), Inflect, PocketTTS, and Supertonic-3 installed simultaneouslya longside it. Although, if it's evidently self-contained in its own folder, I'm unsure why that would be the case, since evidently Sonata Sherpa stores model files in a separate folder from these other synthesizers (as indicated by the voice manager originally stating said voices were not installed).