i did not hear about that "retirement age" rule.
by my best knowledge(and yes, i know they change behavior quicker than we can get used to the last new changes, lol) the 10 years renewal been available just for a short time period, then they realized that they will loose a lot of income on that, as for sure the renewal fees will rise more than once the next 10 years i guess. people who already have a permanent resideny can renew for up to 4 years(they need to be a permanent resident since at least 4 years to do so, others renew for 2 years only). people with temporary 1 years residencies renew again for a next temporary 1 year residency, every year, til Immigrations is in the mood to give them the permanent residency.
Mike