After 5.5years of Tesla ownership I hope you will find this helpful.
Cut & paste of a post I put in "My All Round Charging Kit" in Aug2021:
When I bought my Tesla in the spring of 2016 and, over the next year and a half, I bought a whole bunch of adapters. Chademo (necessary in the Maritimes in 2018 or sooner), 14-30, 10-30, TT-30 (nonTesla), 240v extension cord (24a with adapter to convert 14-50 and TT30 to 14-30), and the 14-50 that came with the car. I have used my 5-15 as much as all the others combined. Adapters were useful then but not so much now with so many more charging options around both superchargers and others. If you travel off the beaten path then the need increases eg. eastern New Brunswick, much of Nova Scotia, PEI. northeastern Ont., Manitoba north of the trans-Canada.
If I were starting over in 2021 I would first ask myself how much am I going off the beaten path? If yes I would get Chademo, Tesla extension cord
NEW! Tesla Extension Cord – EVSE Adapters or similar. I would tailor the rest on what I planned to do. If I was to be at RV parks then 14-50 and TT-30, if staying at friends then 14-30 or 10-30 is more likely to be useful, if campground in Ont. then TT-30, if traveling in the US 5-20 as I understand that they are quite common outdoor plugs there, if at a marina or yacht club then L5-30, if at a friend who is a welder then 6-50, if southern US then maybe 6-15 or 6-20 to use air conditioner plugs.
Overview of North American plugs:
cosmacelf.net/Home%20Made%20Adapters.pdf
I keep hoping that Quick220 will make their product compatible with GFI circuits and not require opposite phases for their unit. I realize it would be more expensive/complicated but either 240v 12a or 120v 24a output would suit our Teslas just fine. This would become my second most useful plug after 5-15 and tied with Chademo and J1772.