This sound ridiculous but vitra chairs are just so good.
I was invited to a meeting in a goverment facility where all chairs have been vitra. They look like normal chairs. Within the first coffee break I had to flip my chair over to check for the manufacturer and model (EA 118).
Since then I am seeking such a chair - in used condition. There is an entire niche of firms renovating used ones.
Didn’t find mine yet but I will. You really just have to experience such a chair.