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Microsoft announces Python formulas in Excel... which have to get sent to the cloud
(techcommunity.microsoft.com)
This is a most excellent place for technology news and articles.
I think you're used to modern interpreted languages and are unaware of how the runtimes of interpreted languages used to work.
Something like Basic (to use a properly old example) was constantly interpreting source code during the entire run.
If I'm not mistaken Python was the first major interpreted language which by default interpreted the code into a binary format and then just ran the binary (and, if I remember it correctly, that wasn't the case in its first version). By this point Java already JIT compilation in its VM for a while.
I think you're committing the error of comparing modern interpreted languages with how Java worked 2 decades ago.