-I really don’t get why SynthV has this big hype around it.
Kanru Hua, the lead dev, developed some standard(ish) tools for UTAU that were considered to improve the software wildly, so everyone was excited for SynthV. Quadimension is also popular.
Eleanor is good but she really isn't that great tbh, she's unfinished and monopitch. I think most of her use is simply because she's free.
Also....
Vocaloid 3rd party dev is slow right now, but I don't think that's necessarily because of Vocaloid but more a wider symptom of a transition period in voice synths. 3rd Party commercial dev is slow for EVERY commercial song synth right now: CeVio has only had ONE new bank in the past 3 years, SynthV hasn't had anyone but Quadimension pick up, and so on.
What I think is happening falls into two parts:
First, newer voice synths.....aren't doing well,
especially in Japan. The V3 wave was a lot of hoping to cash in on part of Miku's success, but companies are losing interest because they
aren't getting that success. Literally, only
TWO Japanese song synths have gotten even close to "Big 10" success since IA's release in 2012. Out of, like, 30+? Some like ONE and Akari did respectably, but not anywhere near the most successful vocaloids. Quadimension is the only recent company to try new synths, and they've clearly been testing the waters for success (and raising funds to make their voicebanks, since they're one of the smaller companies).
Second, CeVIO, SynthV, Vocaloid, and AITalk are all working on deep learning updates. This is clearly the direction everything is moving right now; odds are, companies are waiting to see how this pans out rather than release right at the end of an era (voicebanks released super late generally....struggle).
Also, vocaloids can sound the same, but that doesn't make them bad; some people always act like it does. (No two voices sound identical anyway; someone will probably like a trait one bank has that a similar one doesn't).