The problem is that the snap store is managed by Ubuntu without any community oversight.
By not releasing source code to the store, other distributions cannot create their own.
These are the reasons what is holding snap back for broader adoption.
That is already the case for most repos/launchpad on Ubuntu but people don't really have too much problems with that.
>By not releasing source code to the store, other distributions cannot create their own.
Other distributions wouldn't because the operational cost of operating it is too high.
>These are the reasons what is holding snap back for broader adoption.
Snap isn't being held back by adoption. It has more first party publisher support and more installs.