Kra Canal, again

The possibilities of a canal trough the Kra Istmus has been dicussed for a hundred years or more.
It has been brought up again, but now as something that has to do with the competition between India and China:

That didn’t stay relevant for very long:

One may wonder if it ever was relevant, or was just misinformation (propaganda) put out by somebody with an agenda.

A Canal across the Kra Peninsula would be even more of a potential choke point than the Singapore/Malacca Straits in case of a conflict.
(Only one country to intimidate/control in stead of three)