Adapters that you can't buy and which don't work with a decent fraction of the Teslas on the road -- at least for now. An upgrade may be coming.
The whole point is that Tesla could decide to make their adapter usable with no conditions (other than complying to the standard and keeping things safe) if they wanted to. It's a clearly superior connector, better than J1772, CCS and CHAdeMO. CCS can do 800v but I suspect Tesla's connector also could. CCS has only slowly caught up to Tesla in capability with the crawling adoption of plug and charge, and it remains much bulkier.
However, it is ridiculous to say that the plug used by 30% of cars is the "standard" when another plug is on 70% of cars. It just means that other companies have agreed to use it in common, but the Tesla connector is still by far the most common.
Standards are not some magical unalloyed good. They usually slow innovation, and you don't want that at a time when EVs are in a high innovation period. You can standardize after things slow down. I don't think CCS is the "final" connector, nor is Tesla. However, one thing you can do is keep enough in common that adapters are possible. Adapters should go on stations that wish to serve cars of that type, except for connectors that are rarely used -- those should go with cars.
Now, while a station is free to only serve certain types of cars (either due to physical connector or software decision) it is reasonable that if a station wants government grants to pay for it, that it stock adapters or cords for any connector found on a sufficient number of cars. As I said, the adapter belongs on the station, because there are far fewer stations than there are cars. (Indeed, that can be the threshold for when you must include such an adapter.) Public money for stations should be about serving the public. If 70% of the public have selected the Tesla adapter, that means public money should not exclude it because it's not a "standard."