tbh, got, i don't see a heck of a lot of sense there, common or otherwise.
for every club that's moved, there's another that's stayed put & made incremental improvements to their existing ground.
as for your opinion on the viability & feasibility of redeveloping goodison park, it's just that, your opinion. others have indicated it's possible & with an increased capacity, which makes sense to me - but that's just my opinion.
btw, kirkby won't be 55k with room for more either, nor will it host any world cup matches or concerts.
perhaps you're right & we will move ground someday, but i don't believe it's yet an inevitability. as for kirkby being the only option, isn't that just parroting the board's line? it doesn't seem like a very good idea to me, i reckon we'd be better off looking for one of those elusive alternatives. you never know, we might find one that's better than what we've been sold so far.