I think the issue is exactly what
@romufc outlines. To many feelings involved to be objective.
Dave is undoubtedly a United legend. He has been with us through all the absolute worst years.
A lot probably want him to win a trophy or two as a thank you for your service before we move him on. And I can certainly understand that sentiment.
He has always been a quite guy going about his business. As a keeper that is something that rubs alot of people the wrong way. Having witnessed Schmeichs in his prime its certainly a very different person between our sticks now.
But when you get the hyperbole that he is the worst keeper in the league or the best (both things are wrong) its clear its more feelings than objective valuation of the player.
In truth Dave is overall a average / below average premier league keeper who is sometimes capable of pulling out some absolutely insane saves. And with a higher frequency of those then most keepers.
He has also improved on his distribution this season and is absolutely not the worst keeper in the league.
That having been said he is absolutely not good enough if we want to play out from the back. And on top of that he doesnt deal with crosses, at all, which is an issue, especially since we dont really have the best aerial defenders either. Maguire is good at that part of the game but absolutely atrocious at everything we need from a cb under Ten Hag.
If we want to challenge for the league next season we do need to upgrade the keeper. Otherwise we will have to much pressure on the backline and our build up play will keep lacking.
Yes I do believe a striker is even more urgent, but in reality its not either or.
That having been said some of the posts in here sound more like personal hate then a critical evaluation of the player.