Plsnostrain Absolutely. On my XBox One, I have plenty of games with no strain at all - Destiny was my favorite game of all time. Then Destiny 2 dropped and it was INSTANT strain. They're using a different graphics mode, I guess? Not entirely sure but there's a small thread about it on the Bungie forums from others who noticed the same thing.
Like you, the XBox 360 was 100% flawless at all times. Tomb Raider did induce a little eyestrain but I could play it for a while... Not hours, but a little while.