Who would thought that even at the 2021, software developers and others, will spot problems at Win-8 and latest version of Windows, that Win 7 never had.
The article below gives an answer of how accurate are the metrics (calculation) at multi-core CPU usage by the OS.
According to this, Windows 7 and Windows Server 2008 R2, both are at the safe side.
Task Manager’s CPU numbers are all but meaninglesshttps://aaron-margosis.medium.com/task-managers-cpu-numbers-are-all-but-meaningless-2d165b421e43