Yes and no.
Here's the issue: Because of the way that most 3d Art is implemented, its use usually creates a barrier to entry by those who are not well versed in it. What was a democratized, mass market product can instantly become an elitist tool beyond the technical skills of the Many and is reduced to the hands of a Few at a stroke.
This is not inevitable, but it is a likely outcome if not handled properly.
The best example of this is the difference between BioWare's NWN 1 toolset and Obsidian's NWN2 toolset.
BioWare's was tile based and easily accessible by Many. The number of community modules was vast. NWN2's used a free form mesh and objects instead of tiles. Visual fidelity was greater -- but the ease of use of the toolset plunged and there was suddenly a significant barrier to entry where before there was none. And so the Many became the Few.
So, I hear ya on not wanting 3d, but it's a more nuanced question than that. Not all 3d art implementations need create a barrier to entry - but MOST will. How it is handled and implemented is the more important question.
There is also the integration of current AI tools which are now exploding in the development process. Though those tools are not yet ready for consumer use, there is every reason to think that they will be within the next 3-6 months. If those tools make 3d assets, or at least, will render 2d images of 3d assets in a very useful way, that can impact on 3d VTT's (or 2.5D VTTs if implemented via isometric perspective.)
tl;dr: It's not as simple a question as you pose; it's more nuanced than that.