Barman Cloud was a convenient choice for CloudNativePG (CNPG) because it was developed by the same team that created Barman originally (I am part of both teams). When we started CNPG, we never anticipated it would become so popular, which has obviously resulted in some technical debt. The issue you mentioned concerns our decision not to integrate pgBackRest into CNPG's core, as we aimed to develop a pluggable interface (CNPG-I).

As a community, we have decided to support volume snapshot backups and offer the Barman Cloud plugin to ensure we provide the same level of service. Our aim is to encourage other organisations or developers to create plugins for their preferred backup solutions.

Currently, as maintainers of CNPG, we must concentrate on the core capabilities and allow the ecosystem to grow with both community and, potentially, commercial solutions based on CNPG-I.