What is an alternative to Yahoo Groups, since the new Groups is unusable?

Yahoo has forced a new and unusable format on Groups, with no warning and no way to change back to the old format. Thousands of people are complaining in their forum, especially group moderators/owners. For myself, I cannot search messages any more, and cannot even reply to messages or post new ones. So, if... show more Yahoo has forced a new and unusable format on Groups, with no warning and no way to change back to the old format. Thousands of people are complaining in their forum, especially group moderators/owners. For myself, I cannot search messages any more, and cannot even reply to messages or post new ones.

So, if anyone has a competing Groups website, I'd like to know what it is. Maybe even invest in it, since Yahoo is creating a market for an alternative to Groups.

Suggestions?
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