Does the Greek root ‘aion*’ always entail infinite duration?

One relevant set of evidence is provided by Douglas Jacoby, who notes that in not a few instances, the Greek aion* is used in the Septuagint in ways in which ‘everlasting’ (i.e. infinite duration) cannot be the meaning:-

• Genesis 6:4—“Men of old” (giants/ungodly persons/fallen ones/sons of Cain) did not live infinitely
• Jeremiah 25:12—Destruction of Babylon (though not literally destroyed)
• Genesis 9:12—Perpetual generations
• Exodus 21:6—The man or woman would become one’s servant “forever” (!)
• Leviticus 25:34—Perpetual possession of fields
• Deuteronomy 23:3—“Forever” || the 10th generation
• 1 Samuel 2:22—Young Samuel was to serve at the house of the Lord “forever”
• 1 Chronicles 16:5—“Forever” ~ 1000 generations—also Psalm 105:8
• Ezra 4:15, 19—Israelites had been “eternally” resisting political domination
• Psalm 24:7—“Ancient” doors
• Proverbs 22:28—“Ancient” boundary stone
• Jonah 2:6—Prophet confined in (the fish) “forever”