I have (and when pressed, still) use Finale, Encore and TablEdit.
They all require a lot of work to produce an acceptable product
(at least by my standards).
One abc file can be used with multiple programs.
First the abc file:
It is all text, can be created with paper and pencil in a library
or bookstore ... or anywhere else for that matter.  It is easy,
straight-forward, and quite complete (although we always have
a wish list for additional features -- that get created faster than
a new standard).  I can't think of the number of times I was
able to jot down a tune and walk off with it on my piece of
paper.  Had I been using one of the big commercial programs
I would need to have carried a laptop or found a copying
machine.  You get a whole lot of tune(s) in a short space.
Then the multiple programs:
There are MANY programs (most free) that can use your
single abc file.  It isn't proprietary and it is raw text that can
be easily created and edited.  You do need to remember to
use an editor that doesn't blindly wrap text ... but aside from
this, creating the files are a piece of cake.  Some of the
programs can be used to create tablature for whistles, dulcimers,
ukuleles, guitars, etc.  (You don't find that everywhere.)  Some
are more utilitarian in nature used for transposing a tune from
one key to another key or converting an abc file to a midi file
(or vice versa).  The quality of the finished product is excellent
(in my not so humble opinion).