As someone who was never sold on Xbox, even during the 360's heyday, I find it almost unbelievable that the Xbox One has even competed today. I won't ever say any of Microsoft's three systems weren't impressive or didn't have any good games, but at least the original system and the 360 had a lot of great exclusives. For the Xbox One, I think the only games I was slightly intrigued by was Rare Replay, Sea of Thieves, Cuphead and maybe Killer Instinct. Other than that what titles does it have that the PS4 doesn't? My older brothers both swear by the system because of it's online gaming I guess, but I don't know how anybody could prefer it over the PS4. From a collector's standpoint, the PS4 simply gets more titles on disc, whether it's something like what Limited Run Games does or just smaller budget releases, plus it's got a plethora of exclusives and big AAA titles as well. I like how it has backwards compatibility because although I don't own many Xbox or 360 titles, it would be great to have one machine that could play them all, but it doesn't sound like the library of backward compatible games is all that great at the moment.
Considering Microsoft's biggest and greatest achievement in 2019 was letting Nintendo use Banjo and Kazooie for Smash Brothers, I think it'd be hard to justify owning the Xbox One, a PS4, a Switch and a Wii U, it would never get used and just collect dust on my shelf.