The thing is most Macs on the market spend their lives doing mundane, mainstream tasks. In reality very few used them to do specialist tasks or use specialist software or bother with things like boot camp or windows virtualisation.
Sure lots of people on here talk about those thing on here but this is an enthusiast forum and we know that enthusiasts are very much a small fraction of the user base.
I can see the bottom of the market falling out fairly quickly after the transition completes. Mainstream users just don’t need X86 support and will want the latest Apple silicon cuz marketing. These are also the people that drive the used market.
I can also see Apple obsoleting lots of older models fairly quickly from OS updates.