[Tutor] Python3 : Yes --- Python2 : No ?

[Alan G]

   I'm using my phone so format may be messed up, sorry... 
   <There are also millions - perhaps billions - of lines of COBOL still in
   use... 
   That's a slightly different case since COBOL is a language still in active
   development with new versions coming out regularly (as in every 10 years
   or so.) and there is even an object oriented variant(in fact more than
   one!) . Indeed there are many new COBOL projects being written because
   COBOL has unique features that make it the best language for high volume
   batch processing of data, especially file based data on a mainframe
   architecture. 
   It's not a single version that is now obsolescent. That having been said
   there will doubtless be systems still using COBOL from the Y2K period. But
   most COBOL compilers are commercial and provide full support(at a price)
   for old versions. Very different from an open source language like
   Python. 
   Anyone still using a 1970s or earlier version of cobol deserves all they
   get but most large organisations update their OS and compiler more often
   than that. Just because the language is 60 years old don't assume the
   version is. 

     Alan G.