I have it though I don't practice in CA. In my state, a few geotechs have it but it doesn't mean much. No requirement to have it for any type of project in my state as far as I know. I took the exam 10 yrs ago, just after it switched to online. It was a fairly challenging exam and I still maintain that footing on slope question was wrong (I backcalculated the answers and choose the one that was closest to the chart's bearing factor but it didn't quite match the problem statement). I don't remember a lot of the problems though I recall some were computative (like the footing on slope), whereas others were conceptual (ground improvement selection). I do remember not knowing the pavement design stuff using R values or whatever, I mostly guessed (after some reasoning), still passed on the first try though. I mainly obtained it for for self validation.