How to achieve “paste -d ' '” behavior out of the box in Vim?

Question

Can Vim do something to the effect of the paste -d \' \' shell command, other then by running it via :r !paste -d \' \'?

What are the nativ

Answer 1

My UnconditionalPaste plugin has (among others) the gdp and gdP mappings that paste the contents of a register as the minimal fitting (i.e., non-rectangular) block with a queried separator, just like paste -d {sep} would do.

Like in @ib.'s excellent answer, this would first require yanking the source buffer into a register.

Demo: