I agree with Darwin. Most of the time I’m just satisfied to know they’re gone.
If a well-known long-time community member disappears, it’s disturbing and disappointing, but it’s usually a safe bet that it was voluntary.
@Dog, both your near-quote and your proposed alternative allude to lamented departures. How about Tom Rush instead?
No regrets, no tears goodbye
Don’t want you back, we’d only cry again,
Say goodbye again