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Archive files in .zst format?!?

I see the November 2022 LiChess archive is in ".zst" format. Why the change?

I'm having no luck decompressing with 7Zip on Windows11. Do I need a newer version of 7Zip or do you recommend a different tool?
Thanks bufferunderrun! I followed your link, downloaded and installed PeaZip. Seems to have worked perfectly!
... I still don't understand the change to ".zst". Can anyone explain?
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