The peak was, I think, when I accessed Excel over Citrix while sitting in the airport waiting for a flight.
In comparison, the N900 I have sitting in the bottom of a storage box someplace was a major disappointment--Maemo never came close to delivering half the functionality I had in a 9500, even though the design principles were pretty advanced for that time.
(I strongly recommend reading "Operation Elop" for an idea of what that later stage in Nokia's life was like, and why Maemo tanked: https://asokan.org/operation-elop)
But the 9000 series was definitely something I wish we had today in some usable, non-niche form.