As of a few minutes ago old.reddit.com now seems to requre logging in to access it.
Shame as it was still the best place to browse for info about some niche interests.
Edit: Seems like they might be testing the change as it is hit or miss at the moment.
Edit: Adding this to My flilters in uBlock Origin seems to fix the issue for the time being:
||reddit.com^$header=referer:
How feasible is it (legally, technically) to host a federated, read-only copy of Reddit data from before The Enshittening?
Why bother?
Its all long since been injested by every gen AI model around, just ask one.