Remember, it's designed for mobile use, not portable coverage. So any portable coverage is best-effort only. I personally think other than a few exceptions, the usage of the system as a whole will start out very slow and quiet. There is no other existing system or users this is replacing, so no existing radio traffic that will suddenly "move." It'll likely start out as a very wide-area "chief's net" for law and fire branch which will replace their very limited use (weekly testing) of CESRS, and even more limited use of Satellite PTT talkgroups.
The exceptions are some smaller agencies that look like they might be jumping on board as a more primary subscriber/user, such as some fire districts in Santa Cruz it sounds like? Also any major metro area that signs on as a secondary user and sort of "trades services" between the two systems, so CRIS subscribers can affiliate and use the regional system like EBRICS, and vice versa EBRICS users can jump onto CRIS for Wide Area coverage; likely acting as a "chief's net" as well, with admins traveling around the state to meetings and workshops, and have PTT access to home agency via their interop or wide area talk group. I can also see some CHP multicasting, for situational awareness, or even continued testing to artificially produce traffic on sites.
In short, we can crystal ball this thing to death. The only known to this system is it's mobile-centric design, and it does not forklift replace any existing radio users. So as soon as a site becomes linked to the core, for all we know it might be considered online and live today, at least under a best-effort guarantee while PSC finishes tweaking. There are no immediate problems this is a solution for, it is a solution looking for problems.
