“Priced at $15, Raspberry Pi Zero 2 W uses the same Broadcom BCM2710A1 SoC die as the launch version of Raspberry Pi 3, with Arm cores slightly down-clocked to 1GHz, bundled into a single space-saving package alongside 512MB of LPDDR2 SDRAM.”
A Pi 3’s brain squeezed into the original Zero’s footprint for $15. Old cases and accessories still fit. The catch is 512MB of RAM. Good luck finding one at list price during a chip shortage.