An overhaul so soon would be a nightmare for the VTT.
You're 100% assuming the 3D VTT will be a major financial success story, not a terrible loss that Hasbro get mad about.
Given they've been developing it for what, at least 2 years now, with, according to Cynthia Williams, 250 people working on it, they've probably spent at least $50m already ($100k
costs per person working on it is pretty conservative, as discussed at length in other threads).
There's no sign its near done, or going to be out this year even, so that may well rise to $75m or even more.
For that to make its money back, let alone make a profit, in the couple of years after release, it'll need to both be popular and to have some pretty aggressive microtransactions and/or subscription fees. Unfortunately both factors push against each other.
And Hasbro are an impatient company who are very obsessed with shareholder perceptions, and further, the 3D VTT was Williams' "baby" in the corporate sense, and she's already left WotC/Hasbro (CEO of Funko now, good luck with that!). They are unlikely to want to even be perceived as chucking good money after bad. They're not likely to want to keep working on the 3D VTT and "eventually" become successful/profitable like some companies would.
So I would predict that if the 3D VTT is anything less than an instant hit, Hasbro will shut it down within 2 years of it launching. I don't think "doing okay" will be good enough for them either, given that they'll need a significant number of developers on it to keep making new material to sell as MTX, adapting new campaigns to it, improving features, staying current, and so on.
And so far, WotC haven't given us any clear reason why we'd use the 3D VTT, and further, player habits, in the absence of a pandemic, have moved back away from VTTs to in-person meetings much more than they were when this project was started.
So I think the safe bet is that the 3D VTT doesn't make it to 2030, and that's being generous.
I think this is heavily biased by folks that have been playing forever. Its often overlooked how many people are getting started right now, or coming back.
I'm sure this is true, but historically one would expect this to bias it
in favour of "I'm going to keep playing 5E in some form". Not for the majority of answers to be "Not 5E" (in fact over 40% are "not even a D&D-like" - I'm sure that wouldn't have been true a few years ago).