When Gmail first appeared in 2004, the idea of having what seemed like a never-ending space for email was revolutionary. Most paid services were providing a few megabytes of space, and here came Google promising a full gigabyte (which, at the time, seemed huge) for free. I switched to Gmail in 2005, not long after it was first introduced (at least, April of that year is the earliest email I can find in my first account), and I — along with a lot of other users — haven’t looked back since.
For two decades, Gmail has been my main email app, and I have learned to tweak it to my needs. For example, I’ve created rules that automatically place custom labels on the appropriate emails (labe...