I'm very clueless to this new architecture, but a concern i frequently hear about is lockin (both in language and vendor). Does this style of computing / engin

I'm very clueless to this new architecture, but a concern i frequently hear about is lockin (both in language and vendor). Does this style of computing / engineering hinder open source adoption in languages? Eg, OS images pre-setup with some type of PHP-style provider, letting you run whatever language you want with low startup time to handle each request? I'm sure much of this is way off the mark, so to explain it differently, i'd love to be able to work with a Rust framework tailored to this "serverless" model, and hosted on any generic box i want (or fleets of boxes, etc). And of course, apologies for the ignorance i'm sure is visible :)