I feel it not coincidential that the ai techbros sought out the almost endless text of reddit for training their ai. Especially if you consider the meme of typing reddit at the start of a question to find the answer. Makes me feel like they are the text version of youtube, where lots of things are central to how reddit works and is the default for quite a lot of searches, like youtube is now.

An alternative, though cumbersome, is to set up your own archive, capturing shots of reddit for the queries you wish to keep. Sore em all in a dedicated 'reddit threads' file, capture everything and anything, until the information you need is all on a hard drive and can avoid typing the same things over and over again into google just to find reddit answers. You can get addons for firefox that store reddit threads ( or even most web pages ) as a png file. There is a limit to how long the page can be though before it fails to capture, which you could suss out over time. There's also ways to capture them as web pages viewable offline, but take up wayyy more storage. Images take up less disk space.

If you were dedicated and used a pc, this is one option. An offline reddit for your own use. It's not perfect, and takes up a bit of time, but if you do it, eventually you'll have a copy of your own digital searches.