if Yes, the application will be stability in the o to work...
Depends on the application, for some such frameworks are suitable, for others not.
Stability nothing to do with it, just not everything is possible and makes sense to write on these frameworks.
or it will be Poterie vremini
And it depends on the plans for the future, if you create those applications for which suitable Cordova and Ionic, it will not be a waste of time.