At home I use a 14-50 outlet, usually with a Gen 2 MC plus modified 14-30 adapter (I cut off the neutral pin so that it fits both 14-30 and 14-50 receptacles). 24 amps at 240 volts (= 5.76 kW) is plenty for home charging. Haven't bothered to buy a 14-50 adapter for my Gen 2 MC but I have a Gen 1 MC with the 14-50 adapter.
^ Home 14-50 outlet (the meter was for my previous car, a LEAF, but I don't pay attention to it anymore). Installation cost of the 14-50 receptacle was about $120 by a professional electrician — I had him use 6 gauge wire. Could have done it myself but chose not to.
^ Gen 2 MC 14-30 adapter, for use in both 14-30 and 14-50 outlets. It limits current to 24 amps, which is convenient when using it with my TT-30 to 14-50 adapter. Tesla doesn't use the neutral pin for anything.
On the road, other than Supercharging (I've supercharged my car more than 550 times on road trips), I use campgrounds with 14-50 ("50 amp" in RV lingo) or TT-30 ("30 amp") RV pedestals. That modified 14-30 adapter plugs-in to 14-50 outlets or my old TT-30 to 14-50 adapter. I could buy a TT-30 adapter for my Gen 2 MC from evseadapters.com but don't really need it. I've charged my car at campgrounds dozens of times over the years — campgrounds are my favorite place to stay on road trips because they are inexpensive and I can start the day with a full (or mostly full on TT-30) charge. I especially like to camp at state parks because the campsites are usually nicer than those at commercial RV parks. To find campgrounds, RVparky.com is a good resource because it has excellent filters as well as reviews.
My Model S-60 can handle a full length air mattress in the back. If I don't want to pay for a camping spot for just a few hours I just sleep in the car at roadside rest stops, same as the truckers do.
I have a homemade 10-30 to 14-50 adapter to use with my parents' old-style clothes drier outlet but they moved and I haven't used it since. In more than 100,000 miles of Tesla driving, most of it on road trips,
I've never used a NEMA 5-15 outlet.