Hello there, I have a really good deal to change my one s for a one x for almost nothing (the max my tv goes is 4k60fps so the x gets the best out of it). I’ve read in many places that there are some serious issues with mcc in the xbox one x regarding framerate drops and people been getting a better experience playing with a one s, but most are from last year. Is this still a thing or has it been fixed? Thanks in advance 
Sadly it’s still a big thing on One X. Check my thread about it here for example:
https://www.halowaypoint.com/en-us/forums/84ad72a8b51847978545f685f651fc15/topics/xbox-one-x-performance-needs-to-be-discussed-more/bcb3a2e3-c15a-4b48-948b-293c1fcf1a73/posts?page=1