The decision of just painting over curbs for cost is the main infrastructure mistake and 'false saving' in a lot of European cities outside NL.
The current standard technically doesn't allow for bicycle gutters: Traffic should be either fully mixed on low speed, low volume streets or fully separated. Though bicycle gutters do still get made (space being the primary excuse), from what I've seen it's primarily old roads that have yet to be renewed since the standards changed.
https://bicycledutch.wordpress.com/2020/08/12/cycle-lanes-in...
Furthermore, the legal management of cycle lanes is a lot harsher in the netherlands: drivers are not allowed to drive, park, or stop in cycle lanes. Cycle lanes with solid lines can not be encroached on at all, while cycle lanes with dashed lines may be crossed or used to pass an obstacles.
See for example: https://en.wikipedia.org/wiki/Cycling_in_the_Netherlands#/me...