This is very interesting.

You seem to be suggesting that 'maven' has come to have the same meaning as the word 'sad' has (over the last few years) had in the UK - that is to denigrate people for having a consuming interest in anything.

Here in the UK, you would be considered 'sad' if you, for example spent your evenings cataloging every variety of an obsure plant, it's geograpical locales, population density etc, etc.

If you just sat and watched TV all night you wouldn't be sad.

Is this what 'maven' means in the US, or am I misunderstanding?

For the record, from what I've read, I'd be flattered to be considered a maven

Ed