Although I think it's worth saying how much dubs have improved in the last decade, I've always been reasonably lightly into anime, but always had the odd niche recommendation on the go. Most anime I watch is still casual in tone, so I like to have it on while doing art or something, so I'm a big dub supporter.
A decade ago, you could probably have a rule that unless you'd see someone wearing merch of the anime in public, the dub would be shit, but I think because streaming services are paying so much for dunning themselves, it's lightened the burden across the scene.
Also if over 50% of users watch dubs, I wonder what percentage of their users solely watch high budget, mainstream anime which has perfectly fine dubs.
I 100% agree on consistency, but I actually suspect LLMs would be pretty decent at translating linguistic concepts. Their grasp of contextual language is always surprisingly good, as seen in how well they rewrite tone to very specific parameters.
I don't use ChatGPT loads, but I do use it a little, often alongside a method of project that can't hallucinate. The other week I was talking in one chat about the vocal tone of the novel Blood Meridian by Cormac McCarthy, that has this laconic, worn down dialogue with old testament feeling prose. In another chat, I was prompting 'sage advice' for a matcha scone recipe I wanted to make where I was marbling strawberry directly into the dough. I got which chat I was responding in wrong and accidentally had it give me a the scone recipe in Cormac McCarthy's writing style.
Now this is actually super easy to critique as a recipe, because it fucking sucks. In adaptation, it's lost a lot of critical instruction. This is effectively a translation that must adhere to narrow and specific tone to achieve a meaning that cannot be translated without grasping a meaning to language that exists beyond the words.
Obviously this is English to English, but a big difference is that there is far more Japanese out there than Cormac McCarthy.
That being said, nothing cements what you're saying about consistency more than how badly butchered the underlying instructions to this recipe are.