The distro has been around since 2002, so it’s not that old even though it predates Ubuntu by a couple of years.
I don't know, to me, a distro that's nearly 22 years old is pretty old.
I mean, I'd say Arch is an old distro, having started in 2001. I'd also say Ubuntu and Mint are quite old distros at this point, having begun in 2005 and 2006 respectively.
I'd say something like Garuda, which started 4 years ago in 2020 can be considered new.
And second,
There is a mention that donations will now be tax-exempt in the US, as they are in the EU, but what about other nations, specifically the UK?
isn't Garuda an arch based distro? technically it's not a standalone distro,but a customized arch,so I can't see them as Gentoo,arch,fedora(rhel), debian. same is Ubuntu for example.
You've got it backwards. They're dissolving their old non-501(c)(3) Foundation that they use to manage their finances currently, and becoming a part of an existing 501(c)(3) called Software in the Public Interest (SPI)
TL;DR from the article, they're doing this to:
Offload the overhead expense of independently managing their finances/accounting, by merging with someone who already has a robust system in place
Save money by becoming tax exempt
Allow themselves to accept matching gifts from donors whose employers support such things
Reading between the lines on the gentoo-dev mailing list, I gather that the old system just was not working very well, with friction between the Foundation and the technical side of the distro.