How often do you buy new gaming hardware?

[Augen]

There was a period when I bought more, but as I got older and had more responsibilities and less time I've slowed down and just tend to have larger libraries on platforms I enjoy.

Recent Systems
Nintendo 3DS - August 2012
PlayStaion 4 - November 2013
PlayStation Vita - December 2014

I debated for months on the Wii U in 2015, with Zelda: Breath of the Wild being the game I waited on for years. Now that I know it will be on Nintendo Switch I will likely get that system which will also have ports of several of Wii U titles that appeal to me. I have played the system at a friends house, enjoyed Smash and Mario Kart.

I also have debated on the PS4 Pro, but was saddened that it wouldn't play 4K movies because I wanted it in part to show off 4K television and sound system I've been planning on buying. If they add that in and enhancements to games is significant, I'll consider it strongly.

Future Purchases?
PS4 Pro / PSVR - Maybe 2017/2018 if I see the value in them
Nintendo Switch - Likely 2018 or if a pretty Zelda themed bundle is released in 2017.