[the old merlin]

Paul, that's very true. Much of what I committed to memory to regurgitate for exams almost 50 years ago is irrelevant now.

And my last couple of jobs appeared to have little relation to what I learned.

However, as this evolve rather than change dramatically there's always something hanging about. And an understanding of the basic principles of chemistry, biology and physiology will always be essential.

If I was to try and identify the biggest change in my lifetime I would say it was the "inclusion" of the patient. Offering them information, rather than having them drag it out.
And I'm all in favour of that; always was.