So there is this nifty variable called `baud-rate'.  It can be used to
enable some special display hacks if you are on a connection slower than
2400 baud.  It enables you, I guess, to run Emacs 27.1 on that spanking
new 1987 modem that you have just been dying to get your hands on.

Yet there has been a marked lack of interest in it.  :-(

I wasn't able to find any discussion about it on emacs-devel since 2005,
except for an honorable mention when Alan Mackenzie said in 2015 that
the parts in isearch.el that use it are "probably obsolete".

More seriously, is `baud-rate' still relevant in the next decade?
Should we make it obsolete in Emacs 28.1?

PS. To stir up some additional feelings, I've attached a patch that
    would remove the "probably obsolete" parts from isearch.el.