This spanned the widths and depths of logic and reasoning ranging from the metaphysical to the ultra-technical. He he...I'd say it's really just a matter of two things: Do you want to? Can you afford it? Do it. Even small budgets can get into a system that will reveal whether or not you'd be into it going forward. And we love to upgrade so if it sticks you can do that later. If it doesn't work out, sell it. The net would be worth it, I think, to have tried it.
Would I be wasting my money to get a turntable?
I am thinking about getting a turntable but I have a Class D amplifier (Nad M33) which digitizes all the analog inputs. If the amplifier is just digitizing the source is there going to be any difference between the vinyl and just listening to lossless digital streaming sources? Is there any benefit to me, given my current amplifier with has no analog pass through capability, to adding a turntable to my system?