Oh, yes. It would be strange if the style HADN'T changed over 37 years! Apart from me simply getting older, outside influences have come and gone over that period. I would say that the humour remains similar but, for example, my scripts are a lot less wordy than they were in the early days. But let's face it, we're ALL going to change over four decades, regardless of occupation. I'm sure you annoy your students in a different way!