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Microsoft is enabling BitLocker device encryption by default on Windows 11
(www.theverge.com)
This is a most excellent place for technology news and articles.
If you read that article it's only slow on systems that don't have hardware acceleration, which basically isn't any system from the past half a decade at least (and definitely not anything that would have a compatible TPM)
I'm rocking a 12-year-old 3930k with BitLocker on all drives and it's perfectly fine.