To be clear, it's really the consumer's fault. I don't think intel is paying for OEMs to stay with them besides what they already pay for higher-end offerings. (Really there's a reason why there isn't a gaming notebook with high end GPU and mid range CPU even though a core i5 would do just fine with an RTX 2080. But I digress), actually the problem here is consumer's are allienated with Intel's marketing they think anything other than i3, i5 or i7's are Chinese rip-offs. Seriously every single person in the last year that asked me for a laptop or desktop recommendation was skeptic and annoying every time I recommended a Ryzen powered laptop, even if it had more RAM and was less expensive with me guaranteeing them it would be a better choice, even if it was the same price.
People just think there isn't anything in the computing world besides Intel and that by itself will keep OEMs from moving over to AMD