Every time someone suggests this it makes me a bit nervous because you're advocating I install binaries compiled by some random person and deploy them on all my production servers. If there were official backports of some sort from the python people for example, then yeah, but otherwise, nope nope nope.
The parent example was saying about official ppa only, official as in the original software company providing that ppa. In this case, nginx ppa is provided by nginx developers. Other example is postgres.
