7000 nodes is a big or a small amount? A few month ago was more or less full nodes?
Slow and steady decline -
http://www.coinbuzz.com/2014/04/28/bitnodes-io-indicates-60-day-decline-bitcoin-nodes/
Avg 9500 early this year and 7800 avg 6 months ago.
Go ahead, let us know when the client fork is ready, fork the blockchain and we'll see who is ready to switch to PoS.