https://www.bleepingcomputer.com/news/security/dozens-of-ransomware-variants-used-in-722-attacks-over-3-months/

The ransomware space was very active in the last quarter of 2021, with threat analysts observing 722 distinct attacks deploying 34 different variants.

This massive amount of activity creates problems for the defenders, making it harder to keep up with individual group tactics, indicators of compromise, and detection opportunities.