The key breakthrough for 5G was allowing ~10x the number of devices to connect to a node compared to 4G. 5G is what allowed the toppling of data caps that was by far the #1 consumer complaint for years. 4G just couldn't handle heavy loads well, so data caps were needed to constrain demand.
Teleco's aren't going to say this out load, but it's the real reason why they were so celebratory about 5G, despite it coming off like just a renamed 4G to the average user.