Question, relating to email etiquette. Do people send "thanks" emails at the end of a discussion? Sometimes I'll have a discussion with someone online. Somet

Question, relating to email etiquette. Do people send "thanks" emails at the end of a discussion? Sometimes I'll have a discussion with someone online. Sometimes there's no more to say, and I always wonder if I should send a "thanks" email. No content, but just something to close the loop and a minor show of gratitude. But it seems wasteful. In a verbal converation it's a no-brainer to just say, "thanks for the time", but in email its not clear if its better to do it or to just end the convo by not sending another.