To avoid drift, I would keep the charts in one repo, but separate the values files in different repos per environment. IIRC, Argo CD now allows to get your va

To avoid drift, I would keep the charts in one repo, but separate the values files in different repos per environment. IIRC, Argo CD now allows to get your values.yaml from a different repo than the one you're using for the chart. So you create a very restricted repo for the charts, and then one repo por every environment that only (or mostly) contains a values.yaml. You deploy then X applications or application sets, all pointing to the same chart, but pulling the values from different repos.