As the technology gets better the more we find out we don’t know.
I’d be interesting in knowing what percentage of these unexpected planets are orbiting single stars like our sun which is in a minority.
I’d be willing to bet that as soon as techniques improve enough we’ll see chart on post #1 fill out to a solid blob.
In other words, the current techniques are good at finding large planets, and close planets, and low and behold, that’s what we see in the chart!