List "recent" packages homebrew has installed.
Installed a bunch of tools which had a bunch of dependencies. Used third-party taps. I have now finished with these tools and the dependencies and want to remove them, but I have no idea what their names were (and they are days ago in my bash history). What did I install that day?
A new brew command, e.g. brew list --date DDMMYY or brew list recent X where X is the most recent X number of packages.
If you run brew info [package] on an installed package, brew tells you the date it was poured. So this info is logged, we just need to search by this field.
Can't think of any.