I love john 10:28. It is the clearest statement in the Bible about eternal security.
After studying all the verses about the resurrection of believers, and their receiving immortal BODIES, and NONE that describe Jesus giving the souls of believers immortality, it isn't difficult to understand that "perish, destroy/etc" only refer to the body of unbelievers, which will happen when they are cast into the LOF.
Unless there is at least 1 verse that clearly teaches that the souls of believers receive immortality at some point, there is no reason to assume that.
And, all the verses about the resurrection of believers is about BODIES becoming immortal. But nothing about the souls.
Adam did not become a soul until God united the body he formed with the breath of life. We lose this breath when we die, though we that believe on Him will remain "with Him" always. Existing even if it is only in God's thoughts, heart is just as good as being 'alive' since He has power over death and lives forever. No dead person is remembering you at the moment since they are not conscious except in the form of a name, that He will never forget, written in His Book of Remembrance. I do want to add that your name remembered includes all of your personality, characteristics, and sensibilities, all your being, your soul, because God knows you intimately.