"Really wondering why nobody else in the cabin was downgraded to W instead of me, since BA proffer "We'll also work to ensure your plans aren't disrupted when flights get busy" on the Gold Tier benefits page.

Not that I would especially WANT to inconvenience someone else but they could've been downgraded and then me shifted to occupy their seat and this is what is inferred by BA's hollow promise/marketing."

And with that, all sympathy for the OP was lost.