If a substantial number of old users and power users leave reddit, it might trigger a noticeable slowdown in traffic and a decline in quality (I'm not so sure about this as the quality had been going down the shitter for a long time anyway). Maybe that will alert people as to what's happening.
I deleted all the content and comments I posted from my 12 year old account after the AMA spez did yesterday. I will delete the account at the end of this month if nothing changes (I doubt anything will).