You are asking for a "thesis", for a unique proposition. Well, maybe Perl 5's backwards-compatibility can be marketed, (or will emerge anyway, without any mark

You are asking for a "thesis", for a unique proposition. Well, maybe Perl 5's backwards-compatibility can be marketed, (or will emerge anyway, without any marketing), as a key advantage. "These 20 year old Perl 5 scripts still run without any modifications on the new machine. Amazing!..." There are not many languages that have this property of long-term stability. One of them is R , see recent Blogpost "Ode to R stability" by Dirk Eddelbüttel, one of the R authorities (and Debian Maintainer) http://dirk.eddelbuettel.com/blog/2021/03/20/#ode_to_r_stability http://dirk.eddelbuettel.com/blog/2021/03/20/#ode_to_r_stabi...