Ostensibly, SoftBank’s $4 billion acquisition of DigitalBridge is about AI. However, while the latter’s digital infrastructure portfolio does include a lot of fiber and data center assets, there are rather a lot of tower companies here too, making this a major transaction in the cellular infrastructure industry. Counting the various footprints of the DigitalBridge portfolio, this is quietly one of the largest tower company transactions to date. As a private equity vehicle, DigitalBridge does not have outright control of this footprint, but it can exert considerable influence over decisions and future mergers. SoftBank now stands to gain from this position. Nonetheless, SoftBank has a voracious appetite for AI. CEO Masayoshi San was all over the Stargate Project announcements in January…