I regularly got "Worlds' Best Practice" rammed down my neck in the mining game.I don’t know what defines rare. I was on the 767 at the time, and operated to Hong Kong, Bangkok, and various other ports in Asia in similar conditions fairly regularly. But the 767 did many more cycles than the 747, so I guess there was more opportunity to keep in practice. Really poor conditions aren’t that common, simply because we do our best to avoid them. Holding isn’t always initiated by ATC.
The weather was much less of an issue than was the mindless application of an ill conceived company procedure. It was the cause of much angst at the time, with more than one of the “old and bold” predicting it would end in tears. They were simply fobbed off by the management and training heavies of the day, as being “resistant to change”. That’s another MBA term that’s as worthless as “world’s best practice”.
Doesn't mean it's not mind-bendingly stupid though does it!!