whens it time to think about a data lake

hey everyone, i'm trying to wrap my head around data lakes. we're currently storing a lot of our data in a traditional data warehouse, but we're starting to see limitations with schema rigidity and the cost of storing everything in a structured format. when did you all decide it was time to explore a data lake solution? what were the key indicators or pain points that pushed you in that direction? any advice on the transition would be great too