[zlsa]

CCS1 (the variant of CCS used in the US; basically J1772 + HVDC pins) has a lot of flaws that can't easily fixed in a backwards-compatible way:

1. It's gigantic, making it a lot harder to handle and plug in [0] 2. CCS1 has a mechanical latch on the handle side (as opposed to NACS, which puts an electronic latch in the vehicle side). This results in a few problems: a. The CCS1 latch is is exposed and easily broken, allowing the vehicle to begin charging without being physically latched in (meaning it can be unplugged without pressing the lever to unlatch, while still carrying HVDC at hundreds of amps – there is protection against this but it's not great practice to rely on the control/ground pins being unplugged first, rather than making a latch that isn't so easily circumvented) b. The latch is long and requires a lot of force to unlatch (this may just be my bad experiences speaking, but I've always needed to wiggle the connector a bit to relieve the friction.)

Unrelated to the physical connector, Tesla's charging network in the US is far larger and more reliable than everyone else's CCS1 networks combined, and the only way to use the network is NACS (at the moment, anyway. Magic Dock[1] is being added to some superchargers and will most likely be rolled out wider in the near future.)

0: https://digitalassets.tesla.com/tesla-contents/image/upload/... 1: https://electrek.co/2023/02/23/tesla-supercharger-magic-dock...

[kotaKat]

I have had a colleague describe to me the lingering smell of ozone when he was able to unplug CCS1 while charging. The charger and car dutifully stopped charging and the charger nagged to Not Do That but it certainly left that ozone wafting...