It occurs to me that as I re-read that passage from 1 Cor 3 that what it describes could be seen as a "purgatory;" but not for months or decades or centuries, but only lasting ONE DAY.
Being Born Again is a new spiritual creature that is perpetuated by the baptism of the Spirit at salvation. ANd we did not see this new spiritual creature until Jesus was glorified.
We are "born again" if you want to use that term, in (water) baptism which is when we are initially justified (saved)..
To each His own. Philippians 2:12~~So then, my beloved, just as you have always obeyed, not as in my presence only, but now much more in my absence, work out your(own) salvation with fear and trembling;
I will stick with this for now.......
“Whosoever believes in me will not perish, but have everlasting life.” Jn 3:15
“For God so loved the world that he gave his only begotten Son, that whosoever believes in him will not perish, but have everlasting life.” Jn 3:16
“He that believes on him is not condemned, but he that believes not is condemned already, because he has not believed in the name of the only begotten Son of God.” Jn 3:18
“He that believes the Son has everlasting life, and he that believes not the Son, shall not see life, but the wrath of God abides on him.” Jn 3:36
“And this is the will of him that sent me, that every one that which sees the Son, and believes on him, will have everlasting life, and I will raise him up on the last day.”Jn 6:40
“Truly I say unto you, he that believes on me, has everlasting life.” Jn 6:47
Not getting dipped in some tank for salvation.