As a Tesla owner, opening up their Supercharger (SC) network in the US is a horrible idea. In some areas I already have to wait, sometimes a long time, to get my car into charge. This is just going to make it worse. The SC network was one of the main reasons I bought my S over a Taycan, besides the fact Porsche can't figure out how to do one pedal driving on it. The SC network is a huge competitive advantage they are just throwing it away.
Not to mention the SC locations aren't always in the best places from a security perspective and I can't say I'd like to stand around my LW waiting for it to charge. It isn't like you can do a 10-15 min blast on a Tesla and pick up an easy 100 miles, you are likely going to be standing around for the better part of 30 min to get any decent range added.
Porsche's coast implementation is fantastic and their brake blending is the best in the business. There is no substitute. The Taycan charges significantly faster than anything that Tesla makes, often twice as fast. On top of that, my Taycan 4S outperforms the EPA range by 17%, even with those big gorgeous 21" Mission E wheels -- something that zero Teslas are able to do, because Tesla range numbers are BS.
The SC network is not the advantage that it was 3-4 years ago. As you noted, the waits are ridiculous. In the past six months, I've put 20k miles on my Taycan through 14 states and not once did I wish that I was at a Tesla Supercharger. And yes, I have driven the S,X,3. I have a few thousand miles behind the wheel of a Model 3. Our Mini Cooper SE is a better car and built better than anything Tesla makes.
Tesla is opening up their charger network, because it's the only way for them to get access to those taxpayer dollars. Tesla would be perfectly happy with exclusively overcharging their locked-in customers. Overcharging? Tesla is charging customers 2-3x for their chargers compared to Electrify America in most markets. Given the price disparity, I would not expect a flood of CCS EVs at Tesla superchargers.
Further, Tesla's 400V Superchargers would restrict me to 150kw charging in the Taycan. With the availability of modern 350kw 800V charging, on the basis of speed and cost, I would only use a Tesla Supercharger as a last resort. With the Porsche, I have free Electrify America charging for 2.5 more years. Also, I still have a long ways to go before I burn through the free 500kwh that came with my LiveWire.
I've got a DC CCS charger about a mile from my house. In the northeastern US, new ones are popping up every month in useful places like shopping centers, Walmarts, and gas stations. I am all for multiple options and like the idea that Tesla will be another option, but if I have an alternative, I will be using that before I give that charlatan Elon Musk another dime.