Contributed to 50% of our goals this season.

Without him. We'd be relegated.

Is this because he's played every minute of every game (missed 1 through covd?)?
Maybe if someone else was in his position they would be contributing as much?

I don't disagree with you. But the time will come when we will have to have someone else there, and that time is fast approaching.
We will not get a replacement that is anything like Zaha, unless we somehow fall in a bucket of s**t and come out smelling of roses.
It may be that Eze thrives in this role, or at least grows into it, just like Wilf had to.

There will be more transfer stories about WZ come January. Let us enjoy him while we can. His goal yesterday and his celebrations might indicate he is not so unhappy here after all.

Maybe the management team see it this way.

We will struggle when Wilf leaves. It may be better to struggle now with £50m in our pocket, than to struggle in 2 years with nothing?

I am in no way advocating the selling of Wilf, but I would suggest that the above is something that has been mentioned in the boardroom.

I'm sure the board have thought long and hard about it, but we've never had a decent offer.