cypherdoc changed his mind because Gavin did presumably.  Gavin did because it was easier to do this as quitely as possible than to try to change the laws of arithmetic.

Both of them know that it's the exponential growth that is the critical element here since it is pretty certain to sink Bitcoin eventually.  (Actually, cypherdoc may or may not know that or may or may not care much if he can make a buck in the interim.)

Like I've been saying about {n} MB increase _{(and exponential growth)} for the last while now: 'Watch the pea.'

Of course since I like the expression and it fits a few things here in bitcoinland,  so I've also been saying the same thing about UTXO size.