Your views are common, yet
Your views are common, yet flawed. Much like 100 years of fossil fueled powered transportation, with gasoline, diesel, natural gas and others operating side-by-side, electric vehicle charging will operate just fine with Tesla Supercharger, Tesla Megacharger, CHAdeMO, SAE-CCS-Combo1, CCS-Combo2, GB/T, Chameleon, J1772, Menekkes Type 1 & Type 2, Tesla HPWC, etc.
There are close to zero 350kW or higher charge stations out “in the wild”. Actually, there are few public charge stations over 50kW “in the wild”, except Tesla.
All the world’s public DC fast charging will ultimately be at 400kW (400 amps * 1000 volts). It’s important to note that there is only ONE car that has a battery over 500 volts that has been publicly announced; Porsche MissionE at 800 volt maximum.
1) CHAdeMO is the world leader, with over 17,000 charging stations installed. It is also the only protocol that uses the same plug worldwide. While the protocol is currently limited to 200kW (400 amps * 500 volts), it is likely that the CHAdeMO Association will increase that to 400kW (400A * 1000V) this summer at their convention.
2) Tesla Supercharger is very likely going to pass up the CHAdeMO Association for total quantity of share stations, as they are very firmly in the number 2 position. Currently, the Tesla Supercharger is limited to 146kW (400 volts * 365 amps), and further limited to 120kW into an individual car. It’s hard to say what Tesla will do with Supercharger in the future, but it is interesting to know that the new Tesla Model 3 Long Range is 525 amp capable, hinting to 150-200kW capability. The future Tesla Megacharger is likely going to be their 1000 volt version, probably at 1.5MW (1500A * 1000V), several times faster than the second place competitor. Tesla Supercharger is worldwide, like CHAdeMO.
3) CCS-Combo2 - currently capable of 400kW (400A * 1000V), however the only car that can use more than about 75kW (Hyundai Iconiq) is the future Porsche MissionE at about 250kW maximum (400A * 625V estimated). There is lots of PR promoting 350-400kW, but that is the capability of the charger, not what the vehicle can accept. Virtually ALL electric vehicles that use CCS, as well as CHAdeMO and GB/T, are limited to a maximum of about 45-75kW MAXIMUM, regardless of the capability of the charger. Primarily in Europe.
4) SAE-CCS-Combo1, uses a different plug than CCS-Combo2. Assuming that the SAE just rubber stamps what is being approved in Europe with Combo2, then they should also have 400kW (400A * 1000V) either now, or in the near future. Primarily in USA and Canada.
5) GB/T is in China only, however they were the first to approve 400kW (400A * 1000V)