Yes. While I’m not sure if the authentication upgrade and the callback additions will be a minor change or a patch change - the write scope will be a minor version change. Any minor changes will require the instance administrator to approve the update. This means that there is a fair decent chance that you’ll have instances out there that will not have write scope. I would suggest adding in a parameter either in the path or in the query string to your ui components so you can know if that’s the case. (Something like ?version=2 ).
As far as the rest api calls - once you have the sharedSecret (which is what the install call will give you) you can then call WRITE calls. If you’re using ac-springboot or ACE - that’s going to happen for you.