I'm not hardcore anything but I quit using Reddit and have not looked back. I also don't use any other social, even tough I own other accounts I have not logged into for many years.
Why I don't see myself hardcore? Because there is no hate, or anger and no desire to preach anyone to switch either. I respect people's choice. I disagreed with a few of reddit decisions & their policy change back then and took my decision accordingly. I posted a goodbye note explaining why I left reddit and switched to Lemmy. The same with X, Facebook, or whatever: when I realized I could not trust those services, I told people around me and moved away.
The first one is a classic. The second one may not be as familiar but still is a great movie ;)