migrant
If/when DEFO’s start again, your command when comes up in 15-20 years time will be in seniority order. All the iCadets that joined before you will be senior to you and will have a shot at command ahead of you if they meet the grade. That iCadet who can only be in the seat above FL200 when an SO will have been an FO for about 9-14 years when their shot at command comes up. By that stage they will have as much as 10000 hours on A330/340/350, B747/777 type aircraft. By that stage your prior experience will mean nothing in the whole scheme of things.