Yes, renewable is cheap now, but it was expensive when the rollout started.
"How Germany helped bring down the cost of PV"
* https://energytransition.org/2016/01/how-germany-helped-brin...
From 2017, "Germany’s High-Priced Energy Revolution":
* https://fortune.com/2017/03/14/germany-renewable-clean-energ...
"Germany Paid Record $38 Billion for Green Power Growth in 2020"
* https://www.bloomberg.com/news/articles/2021-01-12/germany-p...