I guess my response didn't really land where it should have.  I must not have paid attention to what window I was in when I posted it.  That's my bad.

The seat bit.....sorry, but I still don't get that one because I have spent far too much time rebuilding seats....mostly Grammer but also Deere spring suspensions... which were worn out or falling apart  with half the hours on them that our hydracushion has, and all it has ever had was one accumulator charge or maybe replacement, I really don't remember anymore.   I like the hydraulic suspension but really it is the strength and quality of the linkage underneath the seat which impresses me the most.  Those castings just seem to be much more rigid and less prone to wobble and eventual breakage then the built up assortment of strap and pins and bushings.