So.. discourse can run on Windows 95?The age of the device implied by very old OS would make it unsuitable.
phpBB runs on Windows 3.1 just fine. It takes a second or five to load a page, but then again that's not much worse than Discourse on my phone. It's markedly better than Discourse on my iPad 1, which works fine otherwise and which I won't be upgrading.
And while this wouldn't be my first choice, it actually is mostly tolerable to use. And that with 24 MB of RAM. And the only real feature Discourse has and it doesn't, is a like button. This is saying something.