> ...which in turn uses the Compression Streams API when supported

> ...uses OffscreenCanvas when available

I think it's a mistake to write your code to automatically use new platform capabilities when they become available if you won't have an adequate chance to validate them first.

It's just too optimistic to believe a new implementation of a low-level mechanism is going to work exactly the way you need. (1) new things have new bugs; (2) changes are you'll end up depending on implementation details that will vary between different implementations.