I can confirm that the stack still works well :) We've been developing a cross-platform app for the German market - therefore the need of offline capability - since 2017 and never had any real issues with Pouch/Couch, that part just worked. The upgrade from Ionic 3 to 4 was was quite painful though.

For user authentication I've forked the nowadays unmaintained superlogin package [1], which still does a great job when keeping the dependencies up to date.

[1] https://github.com/LyteFM/superlogin