I like to provide 2 things, as I’m contributing to help out users:
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timely info: things change, good or bad, and it’s best if someone isn’t blindsided by a change. Honest opinion and the facts count!
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context: Having lived my first 18 years in my local area, and then returning when I was around 38 years-old allows my to provide among many aspects a historical one.
Furthermore, brevity is an axiom and necessity; it’s best to get to the point and convey things in a clear, concise, and even humorous style!