I used to be a professional 3D modeller at an architecture firm, we bought the Oculus Rift, we bought HoloLens, we bought almost every single VR headset that came on the market, and you know what they got used for? Basically nothing. Some marketing stuff and occasionally we would use them to walk a client through a design, though 99% of the time this was just done on a normal monitor or TV.

It's not easier or faster to 3D model in 3D than it is in 2D, since the human brain can't enter 3 different dimensional constraints at the same time. The only real benefit of VR is that it's better conveying a sense of scale and presence. But that's at the cost of having to wear a sweaty bulky headset with limited battery life or a long cord, having to pay for an even more powerful computer than normal to be able to render everything, waiting for CAD companies to rewrite their software and come up with usable 3D interfaces, and not being able to share the experience with anyone and see the same stuff like you do on a monitor.

Even In a business like architecture that you would think would be ideally suited to this, there's still almost no real benefit compared to a traditional monitor setup. Quite frankly the biggest real world benefit is just that if you're in an open plan office you could shut out your coworkers, but again, at the expense of wearing ski goggles and headphones all day.