You know what?
Marketing department @ Intel are geniuses. More so than their Engineers in the last 4 years.
Zero IPC gains in that Time frame and bad rep, sales stagnating. So what do you do to create demand while technically beaten by AMD rivals? Let everyone know about a bug they only knew for the longest of time that affects performance of their older CPU's. So much so that AMD themselves with global foundries backing them up cannot keep up with the surge.
It's like:
Clients- "ooh, 8th gen. So what? we're sitting pretty on our Haswell and broadwell machines, FU intel!"
Intel-" well, FU back. All those processors are bugged, good luck haha!"
CLients- "well, we're just going to buy Epyc then, Bye!"
AMD- *scotty accent* she's givin all shes got capt'n she canae hold any longer!" *holding onto the Coffe machine steaming loudly and shaking on its stand*
Clients- "heeeeeeey Intel! Soooooooo. About those CPU's...."