Looking at the Philly made guys who went away for significant terms during the 80s:

Raymond Martorano - jailed 1982, released 1999 (17 years)
Harry Riccobene - jailed 1983, died in prison 2000 (17 years)
Joseph Ciancaglini - jailed 1983, released 2015 (32 years)
Salvatore Merlino - jailed 1986, died in prison 2012 (26 years)
Nicodemo Scarfo - jailed 1987, died in prison 2017 (30 years)
Francis Iannarella - jailed 1987, released 2016 (29 years)
Joseph Grande - jailed 1987, released 2011 (24 years)
Charles Iannece - jailed 1987, released 2011 (24 years)
Frank Narducci Jr - jailed 1987, released 2009 (22 years)
Phillip Narducci - jailed 1987, released 2012 (25 years)
Joseph Pungitore - jailed 1987, released 2010 (23 years)
Salvatore Scafidi - jailed 1987, released 2011 (24 years)
Nicholas Virgilio - jailed 1987, died in prison 1995 (8 years)
Ralph Staino - jailed 1988, released 2007 (19 years)
Joseph Ligambi - jailed 1988, released 1997 (9 years)
Nicholas Milano - jailed 1988, released 2003 (15 years)
Anthony Pungitore Jr - jailed 1988, released 2006 (18 years)

So that's about a third of Philly's total membership at that time (and most of it's younger, more active membership) going away for an average of 20 years. Plus all the guys who flipped.