Although I'm fairly relaxed about the need to use non-Tesla public charging I also feel I should be prepared for emergencies. However, I certainly won't be paying any subs
Worth downloading all the Vendor APPs that you might bump into. a) Saves having to do that when you arrive (assuming that download IS possible at that time ...) and b) keeps them up to date (assuming you do a regular pass of updating all Phone APPs
RFID is better than Phone APP but ... you have to know that you will need one ahead of time, and got one (which probably means paying an annual Sub)
In Norway several providers allow you to assign your own RFID to your account - so once you have an RFID you can use it "anywhere". Dunno if that is true for UK / elsewhere in EU ?
I'd prefer an app-based PAYG service.
By now they all are PAYG by law ... except ... the unscrupulous consider that "Rock up: Download APP and pay using that" is within the requirement of the law ... so "Flash credit card" is not an option at many/most?
Hence my "download the APP at home when convenient" advice
I have a Type 2 cable in the car
That'll do. Plenty of the A/C is 7kW though ... 22 MPH territory
I doubt I'd buy a chademo
Now that CCS converter is here I can't see there being many CHAdeMO takers (unless no Superchargers on regular routes and CHAdeMO best option for the 3rd party chargers on THAT route).
CHAdeMO converter is expensive ...
But it is 50kW and charges fastest when SOC is high (opposite of Supercharger)
I've used mine 3 times in 3 years, in two of those the alternative would have been major inconvenience, 3rd occasion was best described as "emergency" (not in the life-or-death sense, I was parked up for over 30 minutes !!)
CCS conversion is a non-starter
Not available for your car? If it is available (with cost of both car-modification and adaptor) my inclination would be to do that instead of CHAdeMO. Fast CCS is coming ... and new sites may not bother with CHAdeMO ??
European jaunts are very likely, especially to France.
The UMC adaptor needs some thought for EU (if you will charge from regular domestic socket). France don't care which way round they connect the Live/Neutral to the house, so some need to allow for "wrong way round", and there is a further snag for Germany ...
Other than that:
Supercharger compatible/identical across EU - just plug in. All owned by Tesla of course, so no weird incompatibility to worry about.
CCS is also "standard". But some Tesla struggle to charge at some sites (nothing like as bad as e.g. iPace AFAIK, but might be "very little data" given that Tesla owners will charge, out of preference, at Supercharger whenever they can, so maybe black spots out there as yet poorly / un-documented)
I imagine Type-2 will be fine anywhere (assuming the stall is not broken ... no idea if that is more/less likely in EU to UK? In UK the Status is typically "dreadful" IME)
Dunno about CHAdeMO in EU ... I assume it is "standard" and perhaps less compatibility problems than CCS - CCS being new and Tesla compatibility not (yet) well tested, whereas the CHAdeMO adaptor gets a firmware "refresh" whenever you take the car in for service, so there must be some improvements being released ...
That said, the "improvements" to CCS would be OTA, which is clearly better than a CHAdeMO "once a year service" update
Rapid charging is expensive
Although probably works out no more expensive than Petrol? Which, now-and-then, is probably an acceptable price (for the convenience/necessity)