I also cant imagine professional outfits upgrading systems yet.I doubt it, you need VRAM for that stuff and the lack of NVlink is an issue.
They are either already running dual 3090 so 48GB of VRAM and a ton of performance, so would be a step back in VRAM to get a 4090. Or they have a single 3090 in which case for the price of a 4090 they can get a 3090, PSU and an NVlink bridge.
They likely depreciate the assets over 3 or 5 years, and will want there moneys worth.
They will buy once those system are depreciated / out of warranty, and get whatever is the current price to performance king for their need.