A low level piece of code written in C seems likely to have less portability issues than something sitting on top of many layers of abstraction. The thorny problems that show up deploying on an environment that's not identical to the development environment are often the result of unexpected interactions in the stack of dependencies. This is why containerization is a thing.

Platform portability issues have got easier with better adherence to standards and where you have largely the same code running across different ISAs (and no endianness issues between x86 and Arm) but the popularity of things like Docker suggest many devs do care about reproducible production environments.