I'd keep it. Why? On a APS-C Nikon digital SLR, it's approximately a 50/1.4; on an FX Nikon digital, the 35/1.4 supposedly sings.

http://www.naturfotograf.com/lens_wide.html

It can even be hacked, via adapters, to work on micro 4/3 bodies. We're living on borrowed time with film bodies but not lenses. This is an extraordinary optic that will shine whatever it's stuck to, so hang on to it for now, for film, but also for the future.