Is your feature request related to a particular plugin or theme? If so, specify it.
no

Is your feature request related to a problem? Please describe.
Introduced by this commit: 50dc4ab
The usability is really bad when jumping between words. I found it extremely useful to jump between dashes (-) and underscores (_), and this commit just eliminates this capability which was crucial for fast work with the terminal.

Describe the solution you'd like
Of course I could set my own WORDCHARS, but I don't think this behaviour is something the majority would enjoy using.