Just like WordPress MultiSite installations you can easily adds a new, sortable, column in your WordPress site users list showing the date they got registered.
You might have not tried while using Google that whenever you type barrel roll in the text field it rolls the whole webpage to 360 degrees. Now you can use same feature in your WordPress site too.
Twitter, Google, Blogger, Youtube, Facebook most of the famous networks excluding Hacker News makes external links to open with a blank target. Opening link with target blank means the link open on a new tab of your browser. This leaves your page open and increases time on site so if you are tired of checking box of ‘open link in new tab‘ or setting up target blank for each external link you add on your WordPress site then here is a solution for you.