ZERO has basically turned back into just being a concept I think. Since AI is now possible there's no reason to mess around with the Xingchen/ZERO thing they would have had to do with a Standard voice being compared to VOCALOID4 Xingchen. Xingchen's issue is that there are unresolved contractual issues with Shanghai HENIAN who were responsible for developing her V4 library, but they seem to be getting close to a resolution.
[Edited out]
EDIT: My friend pointed out to me that Ddickky posted ~3 more posts before this one, which changes things a bit. I'll try to summarise. Please bear in mind I don't speak Chinese very well at all and I'm relying on cross-referencing through multiple softwares and dictionaries. Do note that Ddickky is mostly talking about V4 era here since that was when he was involved with Vocaloid.
Post 1 - Even now he still sees comments surprised by Synthesizer V's performance in the engine market. He mentions being so "conservative" in business that his friends said he would miss big opportunities, but he says he knew exactly what he wanted, saying it's okay to take things slow and steady since he's not in a hurry. He says the perception of companies who've had experience of multiple engines is probably better than that of those who know only one. He says Vocaloid's trajectory was set at the end of 2014 (V4 release), and Crypton beginning to research for NT was like the beginning of the end.
Post 2 - A decade ago, Vocaloid dominated the vocal synth industry through technology alone. Third-parties and new companies, even the likes of Crypton, had no choice but to go with Yamaha. In addition to the considerable cost of producing a sound library, you had to pay Yamaha part of the sales and it was very hard to make any money. You also needed the VOCALOID Editor to use a voice library, so for every new person buying a library there was a sale for the editor, which meant while the company earnt 500 (yuan) Yamaha would earn 600. Yamaha was very satisfied and even though companies wanted to do something about it they couldn't. Crypton eventually created their own editor and it was very successful.
Post 3 - A healthy up-and-down relationship (first and third party) should be one that builds deeper connections, mutual understanding and care, and reduces gaming/messing around to increase efficiency. When Synthesizer V started, Ddickky invested a lot and made four libraries in the first year. Quadimension didn't need to be so urgent, but it was important to help Dreamtonics. Industry recognition of Synthesizer V needed to be established quickly and they contributed a lot to Dreamtonics' revenue that year. Most people are not forward-looking and like to go with the crowd. He says Synthesizer V R1's performance and business relations were already outperforming Vocaloid's. Perhaps Japanese companies were more cautious and wanted to wait and see. Back then Kanru and Ddickky were in a hurry to get it out there, but now that they have AHS to help Ddickky is less anxious. He says Dreamtonics will always have their support and they're happy to back them up whenever needed.
Post 4 - Ddickky starts by noting they haven't promoted SynthV AI yet, and says that a little selfishly he wants to have the first AI library from Quadimension be one called Xingchen Infinity, but because of well-known reasons there's some trouble with this. He's still thinking of a solution. At the end of the month they'll be in contact with Chalili apparently. He says, observe fate, everyone. He believes in fate now, karma, it's too wonderful for words.
The last part makes a lot more sense now. He essentially gave us the whole story of why they stopped doing Vocaloid and moved to SynthV, while also praising Kanru for how he's handled things so far. Looks like we might be getting more voices from Quadimension soon!