[samtho]

I don’t think the reaction to everything we dislike should be “let’s make it illegal” because you’re going to end up with unintended harms. If companies are forced to retain public information against their will, many will simply opt not to have a public forum.

If anything, governments should be proactively funding organizations that archive content and governments can archive content of significant cultural or historical value like the library of congress does for physical media.

[precommunicator]

Great! If they don't have a public forum there is no opportunity to do harm, I see no issue here. The community will still ask questions and answers somewhere e.g. in one of Stack Exchange sites which is less likely to be removed and/or forgotten

[HeatrayEnjoyer]

I do think there should be some kind of law, but it would also have to comply with gdpr Right to be Forgotten.