Still plenty of XP and Windows 2000 scopes
There is still plenty of high end test equipment about running Windows XP, 2000 and even 95/98 with ethernet ports.
The simple reason is that new hardware replacements for high end gear are several $10k or $100k.
The problem is that high end test equipment has a useful lifetime far beyond your average PC, measured in decades, not years.
Adding any OS with network capability to any hardware with little or no upgrade path inevitably builds in obsolescence, unless you don’t plug it in.