Its great to see this thread has legs. I have not sold off the 4x5 equipment yet but am shooting with it less and less.
Since my OP I have had to check my mother and father into a nursiing home and that gives me an erie look into the future for myself. Also some strong motivation too. Like tomorrow I will take the Nikon 300mm and the N90s out to a hill over an area I have seen deer in early in the AM. Hope to see some and send prints down for mom and dad to see. (dad would probably tell me to not use a Nikon but a 30-06 to shoot a deer)
A lot changes with our bodies over time, I hope to keep adapting and still enjoying photography.
Canon EOS1N ('Brutus', 1993—), TS-E 24mm f3.5L, 20mm f2.8, 17-40 f4L, 70-200 f2.8L
Pentax 67 ('Pentaximus', 2010—) + SMCP 45mm f4, 55mm f4 & 165mm f4LS;
Zero Image 6x9 multi-format pinhole (2008—); Sekonic L758D;
Olympus XA, Nikon Coolpix P7700
"If you're not having fun, then you're not doing it right!"