I had an uncle who did this. Said he would divorce after kids were 18 yrs old. The kids turned out great! He was an awesome dad. Took care of his wife, built the house nicely for her, etc. But, when the he finally divorced, it caused a lot of problems with his children (now adults). They were so angry he abandoned their mom.

Overall . . . I'm all for this . . . IF you care about your spouse AND you can maintain a healthy home environment for everyone (including you) by staying until kids are older. I doubt many people can do this . . . and if you can do this, are you sure the marriage is a "dead" marriage?