You can run virtual desktops in the cloud, like AWS's Workspaces, sold as a business rather than developer offering. AWS does publish the IP range those clients use, and I assume other similar offerings out there do the same.
I am working from a cloud desktop but I am only visiting corporate approved resources from that cloud desktop and I believe that is the case of most cloud desktop users as the whole point is to have a clear separation of duties.
I'm sure people who can afford to run virtual desktops in the cloud can also afford a phone/laptop/desktop to access sites that block those virtual desktops in the cloud.
I'm thinking more along the lines of people using virtual desktops assigned by their job, and those sites are part of their work. I don't feel like punting to BYOD is a good solution.
