As someone who has travelled in W on an A330 (and will again shortly) I feel like an endangered species.
I guess the value of W depends on how much you feel the need for the extra space.
I regularly fly LHR-PER. In the old days of the BA-QF service agreement I craved the space LHR-SIN, but could do without it for the SIN-PER leg.
Nowdays the only one stop W (within Oneworld) option is via HKG. With the PER leg now up to eight hours I want the extra space. The fact that the CX all W option cost about the same as the old BA/QF W+Y is merely a bonus.
Mind you I dream of being able to get W for a Y plus 50 % fare. Ex UK it is about double