As others have mentioned, having kids can divert one's attention for a while. I got hooked in 1973 when I was in the army and was a real darkroom rat. After I got out I worked in photofinishing for several years but still did the bulk of my work in my own darkroom. When the kids came along my darkroom languished for a few years and I was shooting mostly snapshots and, eventually, digital, but really got back into it after I retired and started pursuing a BFA, which I am 2 classes and senior show away from finishing.
Through all of this I have kept my interest by trying new processes and techniques. I tried all kinds of camera techniques (time lapse, freeze frame, night photos, double exposure, pinhole, you name it) and all kinds of darkroom processes from black and white to color. I veered into graphics arts and started doing posterizations of my negatives and taking those into silk screening with photo stencils. Now I am playing in alternative process of cyanotypes, Van Dykes, Sabbatier, and mordencage. There is always something new to try to keep me motivated.