Us die-hard old-timers who have been brought up on archaic languages like C are quite familiar with the operators you mention - they are taken from C.
Now that newfangled //= operator is something else - I seem to recollect (foggily that is) that it took several years and approximately 3 cubic lightyears of flames on the P5P list before it was accepted.
Now don't you start along that road young whipper-snapper - we'll rustle up a posse of compatibility police and chase you out of the territory.
Seriously: I don't think I have had use for your suggested operators more than a couple of times, and so I don't think it would be worth the trouble. Implement them as functions - that would get rid of the evaluate twice problem.
You can even call them meaningfull and pretty names like 'max', 'min' and so on.
Wouldn't that solve your problems?
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