Although most points are true, I don't think ms is the one to blame about limit of changing new tab page. The reason of limit of change default edge new tab is

Although most points are true, I don't think ms is the one to blame about limit of changing new tab page. The reason of limit of change default edge new tab is simple. It is just due to adwares. The adwares changed the dawn new tabs instead of the users changed it everytime. The popularity is so high that there is no benefit to allow users change it by default. Because users won't do it, adware will.