The migration to Stretch also means certain older versions of our support software stacks will not be available.
Language | Trusty | Stretch |
PHP | 5.x | 7.x |
Perl | 5.18 | 5.24 |
Ruby | 1.9 | 2.3 |
Python2 | 2.7 | 2.7 |
Python3 | 3.4 | 3.5 |
And countless other smaller packages...
It seems some upgrades like PHP and Ruby might be more impactful than others.