At the risk of sounding blunt, what value does IDoneThis (shudder couldn't you have picked a better name?) provide that an email chain can't? Especially since e

At the risk of sounding blunt, what value does IDoneThis (shudder couldn't you have picked a better name?) provide that an email chain can't? Especially since email is essentially free (or, at the very least, less than $5/user/month)?