I didn't see the original post there.

However, I am on some private lists, and every time the person running it changes ISPs, there's a high risk of list disruption. Every time someone wants to change their email address, they have to send email to the correct address. (How many times have you seen "subscribe" or "unsubscribe" messages sent to actual lists, rather than the list maintainer?)

If someone's email stops working, they can still read their yahoo groups messages. If someone's email is running slowly, they can read their yahoo groups messages sooner than their email. Members in yahoogroups can reply to lists (assuming you are allowing any form of replies to the list, which you may not be??) from different email accounts, whereas most lists will only accept email from the recipient's registered email address.

Most importantly, if something happens to you, you can easily put other people into a moderating capacity on yahoo groups. That tends to be much harder on something you've set up yourself. (I speak as someone who "inherited" control of a yahoo group I'm in due to the original creator not having time to manage the group.)

Despite how yahoo have managed to mangle a few things since egroups ran it, there seem to be many advantages.