[beebmam]

My experience is the opposite of yours. Teams I've worked with get massive freedom to implement their services with any (reasonable) language + framework: Rust, Python, Java, Go, C++, C#, and so on.

Seems like an organizational decision

[giaour]

My experience was mostly at small companies with dedicated ops personnel and in government. I worked with a large number of teams that had been chartered with implementing microservices within government agencies, and every single one of them was told what stack they were going to use, either by agency leadership or by infosec personnel.

There was slightly more freedom of choice when I was at AWS, but compliance requirements and tooling support basically strongly encouraged everyone to adopt a standardized stack.

All of which is to say, I get that what you're describing is in theory what microservices are supposed to allow, but I have yet to see it actually work that way in practice.