It's a chicken and egg problem. If you retain the parking but build transit, people will keep doing what they've always done. Partly because people are resistant to change, partly because the areas you can take transit to are still mostly parking lots.

Places like Los Angeles are grappling with 30+ years of investing in transit with minimal changes in modeshare, because they continued investing in automobility at the same rate.

The carrot is great, but we need the stick too.