Funny coincidence: yesterday I read a super long article about how Google is betting on Swift as the next language for machine learning to replace Python in the long term and some ML researchers seem to agree with the idea: Swift: Google's bet on differentiable programming | Tryolabs Blog.
The article also lists the reasons why they chose it over other more "popular" options.
I've never used Swift, I only know it exists and people use it for iOS apps, so I have no opinion about it :-)
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