It's like they're purposefully being snobs making it only available for the most obscure operating system users, or something.
> we don't have the computers necessary to test and distribute on those platforms
Even if hardware wasn't cheap and virtualization hasn't been readily accessible for over a decade, if you're constrained on hardware why are you focusing limited resources on packages for incredibly obscure linux distros? That are more difficult to develop on because a)they're not as high quality or stable and b)there are less support resources and documentation for them?
Re: OS X and Windows, cross-platform support is just going to be all the more painful later.
If you want to invest some money, there are also cheap refurbished PCs, cloud-desktops or some less legal sources for a license from eBay or Craigslist.