It was not rigorous, but here they are...

Pre-Alex I've ran through 5 months of mails, which amounted to ~5k mails, and sorted them out (there was already label Waiting done for me). Post-Alex, in 2 months of mails the sample size was ~2k mails.

Number of e-mail addresses contacted within those 7 month period is ~70.

So you send ~50 mail every (working) day? Could your sheer volume skew the result? (as in: spam people and they start to ignore you, put someone on CC and they have reason to believe it's worth reading?)

I send mails every (week) day, and favor it in front of any other form of business communication.

I've sent 17 since I've started this thread.

I'm curious, what's the average email of those 17? Like, what's the subject and/or value to the recipient and you?

Sending stuff for approval and approving stuff done. This is a busy day, though.