I guess Tesla will have to retrofit the existing charging pedestals with dual cables, to support the CCS connector? I wonder what the time frame will be like for that. I assume they'd start with California, but considering the significant Tesla and SpaceX presence in Texas, maybe we'll see something here soonish.
I'm afraid I haven't saved any bookmarks, but I've seen reporting that Tesla is planning to come out with some sort of single-cable solution with its V4 Superchargers. These will have either a dual-headed plug or a Tesla plug with a built-in adapter. The reporting I've seen is pretty vague, so I take it with a grain of salt, but in the absence of reporting or official announcements to the contrary, I'd expect this to be the way it'll go.
I'd also wager that it's not going to be specifically focused on one particular geography, but rather most new Superchargers that go in after a certain date (excepting those that already had their equipment ordered and were just waiting on permits or utilities) will be "V4".
That'd be my guess, too, but that's only a guess: Initially, new Superchargers will be dual-mode (CCS1 and Tesla) and old ones will remain Tesla-only. I'd expect they'll retrofit older ones eventually, but the timeframe on that is even less certain than the timeframe on bringing out CCS1 support in any form. The V4 pedestal is supposed to be taller than the V2/V3 pedestal, and should support a longer cable. Precisely
how long I can't say, and I expect there will be issues supporting some vehicles, depending on where their charge ports are located. I'm not really all that concerned about this issue; Teslas are currently the most common EVs in North America, and non-Teslas can charge elsewhere, so it's unlikely that demand at Superchargers will go up by more than 10% or 20%, at a guess -- and that only at Superchargers where Tesla chooses to install CCS support.
Do we have stats on this?
Not saying that some Superchargers aren't packed. But how widespread is this?
I've seen various usage stats, but I don't have links to them, and the statistics I've seen don't really address the question of how often people have to wait for Supercharger access. Anecdotally, it seems to be more common in certain parts of California, like in the Los Angeles area, than elsewhere.
My own personal experience is that, in almost 3.5 years of Tesla ownership, I've had to wait at a Supercharger precisely once, at a stop in (IIRC) Pennsylvania on a road trip over the 4th of July (2021) holiday. I waited about five minutes (if that), and I was the only person waiting when I arrived. IIRC, there were one or two Teslas waiting when I left, too. It's been far more common for me to arrive at Superchargers that have few or no cars charging at them. Of course, the problem is that usage varies with time -- both time of day and time of year (heavy usage over road-trip holidays, for instance). Tesla must build out sufficient infrastructure to handle the peak demand times, which means that they'll be under-utilized at other times.
Also remember that Tesla has total control over which Supercharger stations will receive CCS support. In Europe, they've been rolling out support for non-Tesla vehicles on a station-by-station basis. In the US, it'll be even more constrained. This means that Tesla will be able to restrict busy Superchargers to Teslas only, so as not to make the crowding any worse than it is now at busy Superchargers. If they add CCS support to existing stations, they can do so starting with those that see the least use, so that adding CCS support will cause few or no problems.