Keep reading here that they always come back.  
Is it really true in your experience?  
What’s the longest period you know they have been out?  
Kind of wishing my ATF from 15 years ago would come back . She would be in her mid 40s, which is now perfect age for me.

I think it is rare.

stayed that way.

All my favorite girls who left the business are gone for good. I know they will not be back bc I follow their social media. One has a several successful businesses, another is in a relationship, etc.  

Some providers have returned to us 2 or 3 years after leaving the business.. One returned 5 years later. These girls were younger for the most part.

Every lady is an individual and it's hard to generalize.

We are daunted by the computer skills???  LOL  
What else do we need to know if we want to join this "world" you speak of?

I can't think of anyone I've known who "officially" permanently retired and then returned. I have known a few who disappeared for a while = went on hiatus and returned. A couple went overseas for a year or two. Working? One, definitely not. Others, I don't know. A couple moved to another US city for a while. Probably working until returning to work in my areas. Sometimes a short break from the biz is taken to relieve stress or, perhaps, scrutiny by LE or relatives or a real world job. A few months? A year or two? But not intended to be a permanent retirement.

did so for one of two reasons . . . .

For me personally, I've taken 'breaks' over the years, but never retired....
I pride myself on being present and completely in the moment  while with my date. I love to be fully engaged to ensure the best, most pleasurable experience for him and always want him to have my undivided attention.
If I'm feeling preoccupied with other responsibilities like work, family, life in general, etc. then that's when I choose to step away for a bit. Sometimes it's for a few weeks or months, and sometimes longer.
Considering there are so many incredible women to choose from, I've always considered it such an honor to be chosen as as someone's companion. After all, my goal is for the time spent with my date to be everything he wishes for. And to always exceed those expectations.  
So for me, that's why I have taken breaks at times.  
XO

Unless you are in a hurry to do something else with your life, yours is a sensible approach . . . . work when you can give it your all and take a break when you have other obligations or things on your mind.  

You're 2700 years late and a dollar short.
.
Hesiod, 700 BC: "Observe due measure, for right timing is in all things the most important factor." aka "Moderation in all things."
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Another quote from Hesiod:
http://www.azquotes.com/author/37878-Hesiod  
"Do not let a flattering woman coax and wheedle you and deceive you; she is after your barn."

This is worse since I see her getting reviewed at other places all over the country!

That bust of his head looks like he failed to follow his own advice to me.

when the method of contact was pretty much ads in the back of weekly entertainment newspapers.

I did not personally know this guy due to our age difference, but I'll accept your suggestion from his quotes that he was a fun guy to hang with.  Lol

Marie is back, eh?

lol

I know a few that retired.
I miss Mimi LAX the most!

Two years ago I saw a provider that had a court date immediately after our session. Saw an Ad for her recently and hired her. I asked about the court date and her absence... She said she was in prison. Her pussy was tighter on the recent visit.