I can understand what desmond is saying in a way. My personal concern is, whilst i have nothing against Mourinho personally, I think his style of managing is outdated, or is about to become outdated. As desmond mentioned, all the big clubs that we say we should be competing with, virtually none of them play the kind of football we do, they don't cower into their shell against "bigger teams", nor are they negative a lot of the time, the majority play fast free flowing attacking football, and this is a direction football is heading, perhaps the only exception is Simeone at Atletico.
Now say Mourinho stays to the minimum of his 3 year contract, maybe even more, who is up and coming that can take the reigns after Mourinho and carry on what he's done, as far as I can see there is nobody. Right now there is a plethora of talented attacking coaches, some of which are even gettable like Jardim or Tuchel.
There's a reason Bayern want Tuchel, Nagelsmann or even Hassenhuttl as their next manager even if they don't have the CV of LVG or Mourinho, because as a well run club from top to bottom Bayern understand where they are going, what they need to do to get there and they get it done.
My main worry is we stick with Mourinho, get left behind whilst the likes of Arsenal, Chelsea, Bayern etc snap up these managers within the next year or 2. This is why i say it's a precarious position, because i'd like to see Mourinho succeed here, I just don't think him remaining here in the long term will be beneficial to the club in the long term, yes he wants to stay here long term but he wanted to stay at Chelsea long term and we know how combustible he is.
My mind is torn saying Mourinho is the best for the club right now but personally I don't think he's the best for the future at all, it's worrying, there are definitely pro's and con's to Mourinho staying here, I just hope it all works out in the end but i've a horrible sinking feeling we may regret it in the long term if he stays beyond his contract. Hopefully he does go beyond his contract its because he's making us winners, and not getting us barely by in 3rd and late runs in cup competitions.