On it's own, VReverie shutting down is actually a good thing. They're management is notoriously abusive. Of the 14 talents they hired, only 2 remained (technically 3 if you count Furi).
On the larger scale, it's adding to the pattern of small Vtuber agencies shutting down this year. PRISM, EIEN, Production Kawaii, and now VReverie.
Currently, my most watched would be Kanna Yanagi. (probably a bit obvious with how many of my posts include her)
I think why I watch her so much is because she's reliable. She's streams a lot, so there's always more to watch. She maintains a comfy and wholesome vibe, so I don't have to worry about "stuff" like world news or internet drama while I watch. The big collab events she joins or organizes are also a bonus.