@Hayato213 and I have both, on top of oled switches. I'm on disability (only get $560/month), but I was saving up my money. I had to borrow money from my parents for the series x, but I had enough money for the oled switch and ps5 on the same month. I've been trying to get my money back up ever since October (when I bought them). I should have be able to pay my parents back by June, as I've been paying them a little money every month. anyway, I use the ps5 more than the series x, though I have bought most of the interesting exclusives (have all the gears of war, and many others). if you have a series s, I'd say stick with that. right now, I have 0 series x discs. the deals on live for gold and game pass members makes that unnecessary most of the time. not all games are discounted, but quite a few are. I've yet to see an exclusive that wasn't on that list, at least the ones I've bought. I got lost odyssey for like $6 and blue dragon for $4 the day I hooked it up. beats swapping discs for one.
I haven't owned a playstation since PS2, and the only reason I want to get the series X is for the disc drive, which is a very stupid reason considering both the S and X do the same thing but the S lacks a disc drive. Plus I have both my games digitally and don't really care if I'm playing in 4k or not. Resolution doesn't matter in this day and age.
That's why I thought it would be better to get the PS5 to enjoy some Playstation exclusives, alongside my Series S.
As for backwards compatibility, some games are only on disc, like Batman: Arkham Origins, which I mentioned above. I could use my 360 for that, as I don't like a console gathering dust and not being used.
So at the end I'll be owning 3 consoles, my old 360, Series S, and PS5.
Series S for next-gen Xbox exclusives, Playstation 5 for Playstation exclusives, and my 360 for old games that are not available on the newer consoles. Which there are a ton!
I think it would be better to get the PS5, as I don't really have the free time to play on both consoles. Getting them both is for someone who has the free time to use both of them.
Think I answered my question myself.
Stupid me. Sorry for wasting your time everyone!
Thank you all for your great suggestions!