I think there hasn’t been many successful transfers at that level.
Neymar didn’t delivery what he was bought to do, neither did Mbappe (who then left on a free), Coutinho a disaster, same for Joao Felix, Enzo, Griezman, Lukaku, Dembele and Pogba. Rice hasn’t delivered a trophy, Caicedo just boots people, Kane has a league and cup, Grealish won everything but wasn’t central to it. The ones I’d call a success are Bale and Bellendingham (to some extent).
I think it depends on context.
Figo, Zidane, Kaka & Ronaldo to Real were all record transfers at the time and you could hardly consider them failures or wastes of money.
If you look down the list of record transfers over time, yeah, some worked out, but lots were also well worth it.
That’s only the record transfers and not other big transfers at the same time.
For me it’s all about player and player fit - and you trust that the analytics team and scouting team have done enough sure diligence to support the transfer out key and you have a manager that has a plan how to use the player and is good enough to possibly improve them.
The transfer fee is a bit of a red herring - that’s not the determining factor of a players success or failure - it’s just something simple that people use when it suits.
As people have said - Virgil & Ali were both record transfers in their position - and both worth every single penny.
This is all part and parcel of being one of the best teams in the world - you want to sign the best, you need to pay for it, but you also need to be prepared for it to fail.
For years we bemoaned our cautious approach to transfers - I can’t get my head around the overly critical approach now we’ve got our balls out flapping in the wind - this is what we’ve been crying out for - spend big, sign the best and fuck it, if it doesn’t work, we’ll move them on for a reasonable fee and move on.