There are various purposes behind this change, yet the essential one is that there are new sorts of substance and highlights we'd prefer to grow, yet can't uphold on DirectX 9 https://www.lolga.com. This implies when we completely discharge DX11 on Windows, we'll presently don't uphold DX9 as it will be incongruent with future substance.
An agent from Psyonix clarified that the engineers would need to put more into the macOS and Linux frameworks than before to stay up with the latest https://www.lolga.com/rocket-league. Psyonix would likewise need to put resources into successive help for the two stages — as new frameworks could without much of a stretch break on the DirectX 9 substitution pipelines on Mac and Linux.