Of course the Nintendo Switch is 9th gen; as the Wii U and 3DS are 8th gen, as the Wii and DS are 7th gen, as the GameCube and GBA are 6th Gen, etc.

It simply has combined the production and features that were previously separate in its predecessors.

It will be interesting to see how long they go before they release their next console, I think they will wait until 2025.