"C J Campbell" wrote in message
...

good stuff snipped


Age takes a toll on night vision, too. IFR scan slows down with both age
and
lack of practice, as does knowledge of procedures and regulations.

Lack of practice is key. I have enjoyed the freedom and challenge of having
an inst. ticket, but unless my lifestyle changes in some way that allows far
more frequent practice, I'll probably not fly in any significant IMC again.