I couldn't agree more w the principle of picking the source you most value, and putting most resources into it. So, if you're into Golden Age classical, jazz or rock, you could buy that dream tt or cdp, and dive headlong into building that collection, w maybe a cheap alternative source for the odd disc you can't find in yr primary source.
I pretty much expect to form most of my classical collection on vinyl, w some more recent avant garde on cd.
I have no real feel for streaming, would rather have pride of ownership of a physical library.
But I also have deep genre interests for stuff which is more and more only available streamed, and thus here is the dilemma, just how far to concentrate/spend on in effect a third source. I guess if I at least knew what my immersion into this side of things was going to amount to, I'd know how far to delve.