it will be a long and hard period (perhaps even 10 years) of adaptation
You are *severly* udnerestimating it. It is not only that greece wll have tod efault, but also that greece will still be noted as junk as far as bond goes so will not be able to borrow again at good rate EVEN after default, but also that now that greece is outside of the eurozone, it will have to either junk their own currency so far down the rabbit hole to make export / import not kill them that the inflation in the subsequent decades (note the plural) will take a long time to stabilize the economy. And once out of the eurozone , guess what ? Greece will STILL have to have cut back on cost or have extreme inflation , maybe hyper inflation and their own bank default, if they start issuing bond on their own currency and spend like no tommorow.
Greece is a warning to France or even spain, italy and other of the eurozone with ramping up debt : get your table cleaned or it might get burn down as a sanitisation process by others.