I'm now leaning towards the Hyprland/Omarchy approach of starting with a curated blank slate that can be easily themed, customized and extended to suit where I wouldn't have to rely on big drop releases of a single organization for any missing/preferred functionality.
Even at its young age Omarchy has some how managed to attract 134/782 open/closed PRs [1] vs 6/90 for CosmicDE (since 2022) [2] which IMO speaks to the approachability and hackability of a scriptable DE and the community being built up around each.
Edit: as the Cosmic DE repo is made up of many submodules, they all have a lot more PRs/activity combined.