I do exactly this as well. Some things need the user to spend time organizing them because search can't operate on it well (i.e. photos), but email is not one

I do exactly this as well. Some things need the user to spend time organizing them because search can't operate on it well (i.e. photos), but email is not one of those things. 99.99% of the time email search gets me what I'm looking for in a mater of seconds. Spending time organizing emails is going to be a complete waste of time for the vast majority of people. This is also the reason I've never been able to use any 3rd party email clients and rely solely on gmail in the browser. Search is so much faster/better when done directly in gmail. I'm curious to try Inbox and see if it provides a useful added layer of aggregation of messages above and beyond the current "conversations."