>>531075942
comp sci guy here, they switched from zlib (LZ77) to Oodle (ANS) when legacy was ported to EE. there is HW accel for oodle in the PS5 with nvme.
realistically they can achieve higher compression and still read at 2 GB/s nvme speeds

https://steamdb.info/tech/SDK/Oodle/
Which call of duty is 470GB? Cannot be on PC or PS5, since these use Oodle and cap at 175GB. Are you an Xbro?