Consider someone writing a guide on how to install packages on multiple platforms. You only need one guide and not three based on brew. Especially interesting for Windows 10 IMO.
Generally speaking all that documentation should consist of is "click this link to download <thing> for <os>" and maybe "extract its contents somewhere". Anything else is over-complicating the situation for no good reason. Unfortunately that has become such an ingrained part of the open source culture that we keep imagining things like this are a good idea.