There is a lot of difference between 65 and 150FPS if you play a competitive game like CoD. I can enjoy full max details with 230 FPS on RTX 4090 mobile, while to reach anywhere near 150FPS with RTX 3080 mobile I need to drag the details down to medium. Not a big deal, of course , but it takes away from the fun. In two years I will need to drag the details even lower to stay at a competitive frame rates.
of course, it’s all matter of how good you are/wanna be in a competitive game. I can say immediately if I play with 100 or 150FPS and especially if G-Sync is on or off. The implementation of the G-Sync for the 1440p 165HZ screen of X170KM is made terribly as there is still stuttering in CoD. 144HZ and 300HZ are better ones in this regard.
X170KM is worth keeping only from collector’s perspective, as the last DTR warrior. I will keep mine just because of this sentimentality, otherwise pretty much all of the modern gaming laptops blow it away as CPU/GPU/RAM raw power and quality of the screen, no matter what modifications are done.