Subject: Re: Calls: end of an era?
If you buy a call 2 years out and sell it one year out it will retain about 70% of its time value

This is true if the price of the underlying is the same and the implied volatility is the same one year later.

A DITM call will lose more of its time-value as the underlying stock price rises -- I'm willing to accept that penalty.

The relative implied volatility a year later could be higher or lower. So one of the criteria for buying the DITM calls in the first place is to be sure that implied volatility is not unusually high.