Now that GMail wants to be seen as a corporate email alternative, it desperately needs to introduce an unthread option.
I mandate in our company that people use GMail as their mail client and the only real complaint I get from our guys relates to the threading option. Quite simply, some people can’t get used to it. And for some emails, it’s really counter productive.
For example, if you send out a mail to 50 customers, all the replies come back under the one thread. It makes it near impossible to managed the replies to that email when they are get grouped under the one thread.
I love threading for most mails, but it doesn’t work everything. A user should be able to unthread any series of email or at the very least view all emails in an unthreaded view, if they don’t like default threaded option.
There’s a reason enterprise software tends to be boring. When your dealing with large number of users, you generally just go with the option that’s going to annoy the least amount of people.