It is in Apple's interest to get as many of Mac users over to the new architecture as soon as possible.
Intel Macs should get minimum support which includes:
* Security fixes
* Bug fixing
* New version of the OS (for a few more years)
* New features on the conditions it costs Apple very little resources to implement, support and that the feature works well
Intel Macs are getting the minimum support today.
I think we're saying the same thing.
However, it's in Apple's interest to retain and grow as many Mac owners as possible, followed by expanding the existing user base to increase installed units (e.g., iPads, iPhones, etc.). --platform architecture is way, way down on the list