I'm from the Netherlands and can confirm that the 1.5 model is very common. Typically the man has the full-time job and the wife works part-time and combines it with care for the children on the other days. On days where both parents work, often grandparents help out, if not possible it's daycare, which soon will be made free.
Cynical people may think of it as a semi-old-fashioned model, but I couldn't disagree more. I know many such couples and these women see this as a "best of both worlds" situation where they both contribute to society and have invaluable quality time with their children. Some may start to work more hours once the kids are in school, but many just stay on this lifestyle, or then proceed to take care of aging parents. Quite a lot have a job in care, which means altogether their lives evolve around being with people and caring for them. They want to live this way and provide an invaluable service to family and society.
Men often have a parent day, which is one day of unpaid leave per week for the first 2 years. Another variation of the model is 2 x 4, where both parents work 4 days as it slowly gets more acceptable for men to work part-time too.
The important part is of course to have options, so that each can find their own ideal balance.