Mark 9:1 - And he said unto them, Verily I say unto you, That there be some of them that stand here, which shall not taste of death, till they have seen--> the kingdom of God come with power.
Are YOU LOOKING at THIS verse, EVENT, Luke and Matt repeat this same, SINGLE event.
Are ALL the tribes going to SEE this ONE event = NOPE, JUST "some of them" standing their will see it -> THE KINGDOM OF GOD before their physical death.