"but it's haaard to support old things" then you didn't design it right, you should be able to maintain things without throwing them out every two years and you should be obligated to as a duty of releasing your cursed code into the public space
I'd agree on netscape navigator and lynx. But ie6 has always been so horribly broken. Your website wouldn't or shouldn't even run on it when ie6 was around.
A silly instance of Mastodon for queer folk and non-queer folk alike. Let's be friends!