I thought there where incompatible differences between RC3 and RC4. In eltito's quote he says that the enforcement mechanism is going to change. Given that, I don't see how anybody running the RC3 wallet will have their blocks confirmed after RC4 enforcement. What am I missing ?
Two fold. One is pool stratum code, the other is wallet. If stratum is updated, its good to go.
You can safely run with wallet as old as 11.4 right now, no "real" need to have 11.6
RC4 will basically change 6 random votes to deterministic top 10, making the dreaded variance much more in line with regular payouts.
Nothing but good stuff.