Revising this old post, is this more feasible now? Looking at plugshare, it looks like you can ALMOST make it all the way on DCFC using either 101 or 99.
Along 101, getting to Salinas by DCQC is easy. But from there, there's nothing until SLO, which is 130 miles, and no good midway charging point which means likely 2 L2 charge stops. First in either Soledad or King City, and second in either Paso Robles or Atascadero.
From SLO, the final big jump is to Buellton or Solvang, then Santa Barbara and from there it's easy.
Overall 4 DCQC = 2 hours, + probably 6 hours L2 charging. So something like a 12-13 hour trip, certainly better than 24 but far slower than ICE/PHEV.
Along 99, getting to Fresno isn't a huge leap using DCFC... Pleasanton -> Modesto -> Atwater -> Fresno -> Visalia are all easily doable.
From there there's DCFC in Bakersfield, though the comments on Plugshare make me question whether to rely on it or not. Also, that's 84 miles, which is potentially pushing it, so probably add a stop in Delano for an hour or two to make it. After Bakersfield, there is pretty much nothing until the Pitchess Detention Center... Which is a 73 mile drive, on I5, over the grapevine. Probably not going to happen. (There is a place in the middle that lists charging as $25/hour... Not sure what that is about.)
Rather than heading down over the grapevine, heading through Mojave there is DCFC in Lancaster, which should be plenty to finish the trip to LA... But Bakersfield to Lancaster is 90 miles, and uphill at that. So another couple hours to stop at L2, probably at Tehachapi. which is a nice halfway point. Alternatively a free charge is available in Mojave at the CHP during office hours, but that may be a little far.
So that is 7 DCFCs = 3.5 hrs, + 6ish hours at L2, for a 14-15 hour trip. Still less than 24, but a pain.
Also both of these trips concern me that there is no quick backup plan. The 101 trip has a number of L2 charging alternatives, at the cost of more time, the 99 trip has some places where you must be able to charge to make it. Also, both these trips have some amount of elevation gain, and I'm not sure how much of an impact that would have on the driving.
So, has anyone done those trips recently?