If I were to guess: AMD came out really poorly on motherboard pricing for AM5, 7000 CPUs are market leading in price, availability has been poor.

Intel meanwhile has an established year old motherboard pipeline for their current socket that 13th gen can be dropped in to.

If this were 14th gen vs Ryzen 7000 the calculus would be different as all the Intel purchases would also include a motherboard.

Also, Ryzen 5000 is going gangbusters outselling everything else.

My best guess would be deals made with OEMs, advertising and "monopoly"...

There's other considerations at play:

- Engineering support when you're designing a new motherboard

- CPU SKUs with different use conditions. Intel Industrial rated CPUs are rated for 24/7 operation, 100% duty cycle for 10 years. I'm not aware if AMD has an equivalent.

- Long product support - CPU SKUs that are "guaranteed" to be around for X number of years. As as example, some Icelake SKUs are planned to be supported for 10-15 years. Let's use an x-ray scanner as an example. The x-ray scanner mfg needs a computer inside the machine to help process info and display images. The x-ray equipment has an intended lifespan of at least 5 years and they plan to sell/service this equipment for at least 10 years. The mfg wants to use an embedded computer that's going to be commercially available for a long time so they don't have to re-engineer and re-certify their machine. This is one reason why you see some "stickiness" with Intel.

Because your average person isn't an enthusiast who builds their computer themselves, who knows better, and will necessarily change their buying decisions and habits. Instead most buyers choose whatever is good enough and convenient, or whatever brand they've typically historically trusted, or whatever their peers end up getting, or whatever an advertisement/reviewer/salesmen tells them because they're ignorant and not tech savvy.

Then you have reasons associated with vendor lock in. I mean, most people buy DEVICES, not CPUs, and device manufactures are hesitant to switch, because doing so can potentially be complicated and prohibitively costly (especially if they already have deals with their current vendors). Whereas their customers will end up buying their devices regardless of whether they switch CPU vendors or not (because of reasons mentioned above)...

Ergo, as other's have already sort of alluded, it's largely because of branding, marketing, and vendor lock in.

Who cares about top end performance? I really care about performance per watt.

People using laptops, for instance.