Snap packages, what is the accessibility outlook?

[B. Henry]

First, for those who have not heard of "snappy packages", here's a link that gives a few starter commands and a very brief explanation of what snap is 
about.
http://www.techrepublic.com/article/how-to-install-snap-packages-on-ubuntu-16-04/?ftag=TRE475558a&bhid=22717637366411097904609173447
As the subject says, I'm of course interested in whether or not any, many or most snap aps are and or will be accessible with orca.
My other question is about the long term goals of this packaging system.
Is Canonical planning on abandoning .debs eventually? 
The author in the linked to article says "no messy dependencies...". While most of use have run in to dependency issues at one time or another that made 
it difficult or impossible to install some piece of software we wanted or needed part of the beauty of Linux for me has always been the efficient 
use/reuse of libs, backends and utilities keeping our installations relatively small compared with having all stand alone apps that may repeat lots of 
code over and over again.
Is snap intended to always be a supplemental system to be used along side of the .deb packaging system we are more or less familiar with, or are .debs 
and the whole dependency infrastructure to be phased out? 
Will there be some packages available in both .debs and snap packages?
I have read a couple other articles, and it does appear that spans and .debs will live along side one another in the near term, was asking about plans 
farther out. 
Are snaps mostly paid aps, or their free ones, in both senses of free? 
Thanks for letting me pick your brains folks.
 
-- 
     B.H.
   Registerd Linux User 521886