Microsoft is using Delta for their Fabric Lakehouse architecture and its also what OneLake is built around so now you have another massive player choosing Delta.
Massive corp, with their own opaque interests and endless bodies to throw at problems has picked a favourite. That favourite being an “open” format controlled by another opaque enterprise company. I’d half expect M$ to just take it wholesale, and start modifying it to suit their own ends, until eventually the “open source” component is some skin-deep façade that completely and utterly dependent on M$ infra.
Feels a bit like, “If Delta Lake did not exist, Microsoft would have to invent it.”