It absolutely has not. I absolutely agree most of those kinds of apps could, and those that can probably should, but more than enough have not.
I support a lot of dental practices using Patterson Eaglesoft and they still don't officially support VMs in any form, even for the server (despite it working fine) while they have removed all support for using terminal services. Obviously the basic application works fine, but a dental practice needs to be able to take digital x-rays. Shock the sensor drivers only exist for Windows and back when RDP and Citrix were supported it required a special bridge running on both the client (which of course still had to be Windows) and the server.
We used some thin clients back in the day for front desk stations and hygiene rooms that didn't need any special hardware, but the main practice rooms and the pano stations always needed full Windows PCs.
The client app is built with PowerBuilder so it'd require a deep rewrite to support any other platforms.
The server side is a Sybase SQL Anywhere database and a SMB file share so it could easily be run natively on Linux but the vendor can't be bothered.
This is a company that still insists that every user needs local admin privileges, despite literally nothing going wrong when they don't have it, and who usually doesn't support new Windows releases until a few months after it becomes the default for new PCs.
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There are other dental platforms that do have web interfaces intended mostly to enable the use of iPads and other tablets but switching platforms is far from straightforward for practices with years of data, custom integrations, etc. Even if you are willing to go through the trouble (or starting fresh) those platforms, to my knowledge, still require Windows PCs for digital x-ray support.