The migration of Lens from Polygon to Lens Chain involved transferring 125GB of user-generated data, including over 12 million posts and 28 million social connections from Polygon, as part of the transition to Lens V3 following a $31 million funding round.

Quotes that support claims

Last December, Lens raised $31 million in a funding round led by Lightspeed Faction... The protocol has raised around $46 million across several funding rounds and claims to have over 650,000 use

The rollout was eventually delayed by a few months to enable developers to migrate the massive data set in Lens V2 on Polygon to Lens V3 on Lens Chain.

To reach this point, developers led by Aave founder and CEO Stani Kulechov had to migrate more than 125 GB of data, including 12 million posts and 28 million social connections of more than 650,000 users.