I've heard hoarding correlated with SP in more than one place. With all due respect to those ideas, I think it is a little more complex than that.
My father was a hoarder. I mean you could have put him on a TV program. It took me years to finish cleaning out his house after his death. He saved everything...every newspaper, personal document, book, soap, medicine, piece of furniture, electronic good imaginable. Most of it was literally--I mean LITERALLY--old junk. He was also chronically short of domestic knowledge, so the house is falling apart in many ways that I can't afford to fix.
But the guy was a sx/soc 6w5. Archetypally sp-last. ENTP.
I actually see his hoarding as Ne/Si-related--Hey, I might be able to use this. Hey, I might need this in the future. Hey, I could make something out of this. Hey, I could use this in my work. Seeing multiple uses for one object. Ideas. Potentials. I'm not saying every Ne/Si-user does this (I don't. I get rid of things so they don't hold me down). I'm just saying that I think there's more to it than just sp-related accumulation. I'm sure there are varied reasons for hoarding, and being sp-first is only ONE of them.
Also, it's worth noting that self pres can just as equally want simplicity and minimalism. There can be a paring down and an emphasis on the basics, rather than a need to accumulate more stuff.