As an obviously knowledgeable person in this area, where does most of your pessimism regarding this issue stem from?
I am just trying to increase my level of sophistication when it comes to understanding charging .
Tesla has gone through great lengths to make their super chargers "repairable" in nature. Reliability wise, they have the same issues that ALL charging networks have, including major handshake/software issues that plague all networks.
Tesla's software "had" a slight advantage in delivering an end to end solution where they could have proprietary recovery mechanics and handshakes to initiate charging, but this is not the case when using an open CCS protocol (which they've adopted). Tesla is not going to impose proprietary communications with other vehicles, because that's not the direction any of this should move.. or even would be wise to move to.
Over the course of a decade, the Supercharger network has become a cornerstone of Tesla's business and they've had to scale up their SLAs on how quickly they address and identify "down" stations. This is great, but it just reduces the time for how long stations are down, it doesn't address how often they go down or how often they fail to handshake with vehicles at a software level.
With that being said, everyone here will experience the EXACT same CCS handshake issues on the super charger network as they will EA, EVgo, etc. There's no magic bullet for this other than hardening the stack to orient everything around making CCS communications with vehicles rock solid (which groups have formed around doing). Tesla isn't going to fix this issue, NACS isn't going to fix this issue. Time, money and scaling will fix this issue alongside regulations.
This transition is going to be super awkward for older Tesla's due to not having onboard hardware that can communicate with CCS, non-Tesla vehicles needing to support > 400v architecture, and superchargers are going to be put through the ringer with a very small portion of them being v3 or above and being able to even talk via CCS. Superchargers that support CCS isn't something that's been hardened ... at all.. This is ALL new at scale. Note that Tesla hasn't even entirely solved their own charge network issues yet... and they've had the longest amount of time (and least amount of friction) to do so.
Also, to be very clear, if you actually compare charging speeds with Superchargers... it's typically slower _for Tesla's_ in comparison to high voltage charge stations like EA or EVgo. When everyone gets a taste of this, the reputation will start to tarnish. There's a grass is greener look happening right now... and it's a false narrative.
What everyone _should_ appreciate is getting a nicer charge plug and having more available charge networks for competition and emergency/availability sake. That's a win win for everyone. I would not try to oversell Superchargers as they simply aren't that much better than the competition, just more available.