I've been at it since 1971 - 41 years. 😱
I was in 9th grade and took a photography class where we learned basic B&W film developing and printing. That year, I got a Petri FT 35mm SLR for Christmas (thanks, Mom!)
I'll be 55 in August 😱😱😱 and am still making photographs and developing my own Tri-X, although the Petri FT was long ago sent packing when I upgraded to a Nikkormat EL, which is gone now. It has been replaced by a Nikon F3hp, an F100, and two FM2n bodies.