This is not my experience. When I make a purchase or have a defective unit replaced across the boundary of a model change, my experience is that Apple simply changed the order from the old model to the new model--with permission, of course.Purchasing person from OP's organisation: Hello, we need 300 Macs before the end of the year
Third Party Reseller Person: Ah right no worries. Let me get you a quote
Purchasing person from OP's organisation: I heard about these Apple Silicon things coming out? Do you think we should wait for the announcements or purchase today?
Third Party Reseller Person thinking about his targets and bonuses: Nah. They are going to be like double in price! You should totally buy today. Hell, I'll throw in some Apple TVs too
Purchasing person from OP's organisation: Great. Sounds good!
There is no way that AS Macs will be substantially cheaper. Just look at the price of a top iPhone or iPadPro. They may be slightly cheaper, or they will be at the same price points, but NOW 2X FASTER with more magic. The marketing practically writes itself.
As for price changes, again this is not my experience. The only model upgrade in my experience that came with a significant price increase was the switch from the Trashcan Mac Pro to the Cheesegrater II Mac Pro. Apple's historic practice is to replace the old model with the new model at about the same price as the old holder relative power constant. By this, I mean that I am comparing the power of the new computer to its contemporaries. Compared to the computer that it replaces in the lineup, it is substantially more powerful.
I don't buy a new computer everyday, but I have purchased new Macs since 1989. When it comes to the FUD that I read here about what to expect with the ASi Macs, I have to call B.S.