Addon to mimick 2.7 "collections" etirelly?

Does anyone knows such addon? I am so tired wasting hours with current collection system. Doing redundunt dublicates of my objects because original ones have mystically lost among collection trees or collections duplicating each other.

The old system with groups was so simple and logically intuitive. it allowed to compartmentalize things and you always have a button to show all if you lost track of something.