Given the millions of Intel Macs in users' hands, it is not unreasonable to expect macOS updates for Intel x86 to continue for another 4 years. Beyond that is still within the realm of possibility (because Intel Macs are
still being sold), but I'll stay well on the conservative side for now. Four years is a long time, which means building a new Hackintosh today still makes sense -- more so if we can reuse existing parts and sell off retired components.
Having spent over $3000 on a new 14" MacBook Pro, I expect Apple's new prosumer and pro level desktop offerings to be very expensive when upgraded to 32GB RAM or 1TB or 2TB SSD. Base models will likely use binned processors in which at least one CPU core and at least one GPU core has been disabled. And there will not be support for eGPU.
27" Apple Silicon iMac and pro-level Mac mini are most likely to be bereft of DIMM slots, making them completely un-upgradeable. Buyers will have to decide up front how much RAM and storage they will need for the entire period of ownership. To be fair, this isn't a particularly difficult decision, but it adds pressure to over-configure and over-spend.
An Alder Lake Hackintosh today with 8 P-cores handily beats the Apple M1 Max as we can see:
My 14" M1 Max on the LEFT with
8 P-cores and
2 E-cores, and
@StefanAM's i9-12900K on the RIGHT with
8 P-cores (w/HT):
View attachment 535616View attachment 535617
My non-overclocked i5-12600K with 6 P-cores (w/HT) produces
1930 and
9580, respectively, for single core and multi-core. And this is a $299 chip on a $280 motherboard with DDR4 DRAM that costs less than $200 for 32GB.
And if we look at the GPU compute score, there is no contest. The AMD RX 6800 XT wins by a landslide (my 14" M1 Max has 24 GPU cores while 6800XT has 72 of them):
55732 on M1 Max versus
176833 on 6800 XT.
View attachment 535618View attachment 535619
Even with Apple Silicon, I do not think there will be a product from Apple that competes on Price + Performance + Modularity.
Modularity is toxic to Apple's revenue model, so any modular system is likely to be priced in the stratosphere.