For some folks, those bad knees, folks at risk for SVT, might be more than an inconvenience. Lack of legroom is why I don’t fly anymore. Period.
DVT that is...
When I was younger I always chose the windows seats because I wanted to look out the window, but now I am sort of handicapped, I have to walk with a cane as I have a degenerative disjoint decease and a degenerative hip joint decease. I have no strength in my right leg and am unable to use it with out a cane to walk. I used to be able to walk quite fast when I was younger and miss the time. Thank God I can still drive though.