Is it too late to learn DirectX 9?

Question

3D

Good day to all!
I found one good book on DirectX 9, and on the forms I asked questions about DirectX 9 several times, and everyone who answered said "DirectX 9 is dead !!!". And now the question arises: should I continue to learn 9-ku or still go to 10 or 11?
Then the question arises: what tutorials does he learn from: tutorials for DirectX 10 or DirectX 11?

Answer 1

In principle - no, fundamental knowledge does not harm if you have enough time. But it's better to combine business with pleasure by starting right away with DX11.

Answer 2

Upgrade to DirectX 11.
Videos from Microsoft Virtual Academy
DirectX tutorial