I've owned my Model 3 LR since June. Number of times L2 charging has exceeded 32 Amps: Zero
I really do appreciate owning the higher rated OBC but opportunities to take advantage of it seem few.
FWIW, 2 folks in my group at work have LR RWD 3's (therefore 48 amp OBC). Actually, we have a ton of Teslas (over 100 Teslas in our internal registry but not all of them show up every day, let alone charge every day) of all makes (except only 1 Roadster) at my work. We have a couple HPWCs on 100 amp circuits (80 amp max output).
One guy keeps "forgetting"/forgetting to bring his J1772 adapter so he can't use our Chargepoint L2 stations (30 amp max) and he complains that it's too slow. He says he puts on about 80 miles/day but at least he can charge at home.
Another guy lives over 50 miles from work (almost all highway) and until under a week ago, he couldn't charge at home except at 120 volts. He hated using Chargepoint L2 for the speed reasons. Charging at 48 amps was 60% faster than 30 amps. If he gets in too late (which he kinda has to as his commute is horrible), he may not be able to get to a ChargePoint handle until the afternoon. And, he'd have to juggle/get lucky trying to get an open Tesla HPWC handle as they get filled quickly and aren't networked. We have no way of remotely checking when a HPWC connected vehicle is done or whether the Tesla charging spaces are occupied.
(We also have other problems w/sharing the WCs such as the stupid Tesla connector remaining locked to the car after charging is done w/no option for the driver to alter this behavior. They need to be monitoring internal communications channels and unlocking remotely (which also apparently times out and relocks). Also, we haven't found the trick to open the charging door on an X w/o the key or w/o pinging the driver. It's easy on an S and easy on the 3, if you know the trick.
And, we have also mystery cars who aren't in our registry
+ the plethora of new Teslas w/no plates yet.)
Of the Teslas at my work, their max OBC amperage run the whole gamut from 40 amps to 80 amps, and soon 32 amps.
I will agree that if charging over J1772 in public or work, very few are over 30 or 32 amps.
When MRs and SRs show up, I think we'll need signage to tell those drivers to use our ChargePoint stations instead, leaving the WCs open for higher amperage OBC cars. At 208 volts, the speed difference between 30 and 32 amps is negligible.