Always had a soft spot for Mageia, as I thought their Admin panel was an improvement compared to SUSE's.
But unfortunately I think they are slowly dying. Their forum is a ghost town, and besides their Admin panel, there isn't anything compelling about Mageia that would make me consider it over other options.
Because of the Redhat incident, I started to see people asking for community-based distros without a corporate that dominates the community. And, Mageia is one of them. So, I hope it will be more popular.
KDE is the default. So, for KDE users, Mageia with KDE was tested.
Mageia comes with Drake tools for configuring almost everything. IMO *drakes look quite friendly. Since they have been around for 20+ years, they must be stable.
Each release will be supported for 18 months, which is longer than Fedora.
Even then, I feel that gives the wrong idea. Debian is the community project to Canonical's commercialized Ubuntu, meanwhile, Mageia has its roots in being a community project brought forth from a commercial product.