The whole P-core and E-core architecture is everywhere now on the ARM world that people keep praising around here, if anything Intel is trailing behind.
I understand it on ARM, since it's primarily targeted at mobile and other oddball devices, but using on desktop class chips just seems odd to me. I'd even understand doing so on laptop chips but desktop ones just seems like leaving extra performance on the table.
P and E cores were around on arm at least a decade before Alderlake released. I remember being told to hold out for Haswell because it was rumored to have big and little cores like arm cpus; enabling your computer to use minimal power to check for mailbox updates.