Archive.is runs Tor through a Cloudfront captcha which fails consistently in my experience.
Just tried it now and works for me.
It is an annoying captcha, it had something like five steps to complete, but I've seen worse. I'd rather this captcha than the one that Roblox uses.
I agree that turning on JavaScript with Tor is risky from a security viewpoint. It significantly increases the risk that your real identity may be unmasked.
Archive.is runs Tor through a Cloudfront captcha which fails consistently in my experience.