See, my dad's a huge cinephile and so he got a big 4k tv relatively early on but now that 4k hdr TVs are becoming more available he wanted an upgrade but also didn't want to discard a perfectly functional TV.
Furthermore, I didn't want to buy a prebuilt since a friend of mine who recently upgraded his system sold me his 750d and corsair hx1200i for 100€ and I wanted to maybe built on that foundation. I thought about maybe pairing a 1080ti with a 1900x since I want more than 24 PCI-E lanes and more than 6 cores but also don't want to risk shorting out an 800€ CPU just to get it to run at manageable temperatures.