I had a NEMA 14-50 installed a few years ago for my wife's Model 3. I've been charging using that with a J1772 adapter. That set up more than meets my needs.
I only opened the box to the FCSP to see it and take a couple pics.
Would love to have used it, but it would require electrical upgrades to the home that I don't ever see doing.
PM me if interested.