[steveklabnik]

In Ruby world, some people are still on 1.8.7, even though it was end-of-life'd in June, and it was known that it would be on that date a few years before.

Change is hard. People don't want to spend the money on upgrading. It's almost all downside with very little upside.

[pjmlp]

Around January this year, my employer was still getting requests for Java 1.4!

Don't ever upgrade a running system until you are forced to do so.