I'm not so sure. Many people still ran Windows XP/7 long after the EOL date. Unless Chrome, Steam, etc drop support for Windows 10, I don't think many people will care.
There are many, many Windows XP systems still running today in many corporate and probably gov environments too. Even more Win 7 ones. There will be special contracts, workarounds, waivers, etc - all to avoid changing OS.
Side Note: Folks, don't run EOL operating systems at home. Upgrade to Linux or BSD, and your hardware can live on safely.