It's just a marketing gimmick fueled by resentment over Apple ditching Intel processors. Predictable stuff. The Perseverance Rover isn't really relevant considering the extremely long certification process computer hardware has to go through to be considered space ready. Missions are planned years in advance using existing hardware that had to pass years more of testing and design changes, especially radiation hardening. The Hubble Space Telescope runs on a Intel 486 (even after servicing missions), the ISS has several systems using Intel 386 chips and the Chandra X-Ray Observatory has been using a VAX system based on a 1750A processor since being launched in 1999. Current off the shelf hardware wouldn't survive for very long in the environment of space.