The third party API changes come into effect tomorrow (1/7/2023) so now's a good time to either purge or edit your existing content.

There's still no guarantee that Reddit wont just revert your changes (which they've notably done to a few people so far), but at least editing your comments before you delete your account is one way you can let them know how dogshit their handling of this situation has been.

This thing was as easy as adding it to your bookmark bar on desktop, signing into old.reddit.com and pressing on it.

It's a shame to lose years of great posts and comments but with how poorly Reddit has engaged with the community over this, there's no point sticking around.