While I feel that's cool in theory, the problem is usage: Is Tapas going go out of their way to integrate what might be a pretty complicated to implement feature, a feature that most writers are probably never going to use?
Also, with the new redesign, it's the least of the website's priorities. They've got enough on their plate as it is.
And speaking of redesigns, I feel like if this website were to do another one in the future, this might be a feature that'll be easily broken. Just given it's higher difficulty to implement in the first place, it's probably gonna be harder to maintain, and easier to break with drastic layout changes to the site.