I started on guitar at age 10, took up bass at age 13. Until I was in my late '20s, I was equally good on both, and frankly had a pretty good rep on guitar.
Then I started having kids and had to make choices about what to do musically, when and with whom. Where I ended up is that my heart, musically and otherwise, is as a bass player. That and the fact that, on reflection, if there are 3 billion people on the planet Earth, something like 1 billion of them play guitar. I just lost interest in guitar.
I do keep doubling though. My band duties call for not only bass guitar but upright bass, mandolin and harmonica. But I haven't touched a guitar in maybe two years.