Slack is gratifying to work on in the same way that Flickr was. The mission is to make people's working lives simpler, more pleasant, more productive.
He who has seen one cathedral ten times has seen something; he who has seen ten cathedrals once has seen but little; and he who has spent half an hour in each of a hundred cathedrals has seen nothing at all.
I think the best thing for you to do is just live your life. Live a life that's worth living, one where you do what you want to do, pursue your passions. That way, if you meet someone, they'll be joining a life that's already really good.
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