attempted repost: discussion around a change from 9.4.1-1 ?

i'm trying to understand more about this change since it, seems to have
unpleasant results during a yum update when there are multiple server
versions installed on a machine at the same time.

* Tue Feb 03 2015 Devrim Gündüz <devrim(at)gunduz(dot)org> - 9.4.1-1PGDG
- Update to 9.4.1, per changes described at:
http://www.postgresql.org/docs/9.4/static/release-9-4-1.html

*- Improve .bash_profile, and let users specify their own environmental
settings by sourcing an external file, called ~/.pgsql_profile. Per
request from various users, and final suggestion from Martin Gudmundsson.*

that it wiped out the ~postgres/.bash_profile that existed too, which
caught some of my peers by surprise.

I realize this was 'a long time ago' and they should have raised the
concern sooner but I'm just trying to educate myself on the discussion
around this first.

basically, i'm trying to understand what people should be doing
differently, and what the perceived upside to the community is.

-Mark