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.
Opening this task so we can discuss:
* Expected impacts
* Timeline for notifying users
* Any other areas impacted
* Insights into our supported stacks policies (how traditionally did these upgrades)