When is a file considered mature and thick?

[FreedomHammer]

I lost 28 points on my FICO8 score today across all three bureaus when my Self installment just now reported closed.

My TU FICO 8 score is 787. My FICO9 bank card score is 679. Yikes. 

[FreedomHammer]

Bumping this thread to update on progress and a question:

My oldest account (a student loan) is 22.9 years. My AAoA is 10y8m. 

I had bad credit and essentially have a gap in revolving history (the revolvers fell off) when the majority of the student loans fall off in 2025. 
 
I have five credit cards now, and I figured when the student loans age off, my oldest credit account will drop to about 10y, and my AAoA will drop to about seven years. I will have had my five revolving accounts for about 4-5 years.

Assuming I open no new accounts, do you think my creditors will take adverse action due to aging metrics of accounts falling off? I will have a large gap in aging metrics.

 I'm looking at a score of around 800-805 by 2025, if the simulator is correct.

The simulator I ran again with how my profile will look in 2025, and it says my range will be 750-800.

I am currently AZEO FICO 8 Experian 774. 

Should I be concerned with my creditors? 

[jamie123]

IMHO you will easily be in the 805 to 820 range by 2025 as long as you keep your utilization under 9%. Once credit gets to be over 3 years in age you slowly gain the last 20 to 30 points to get to a perfect 850. And really...once your scores are over 760 they are excellent in the eyes of creditors. Any extra is bragging rights!