At our company we had used hipchat for a little over 2 years, back when it was charging for when you had more than 5 users. I had previously tried to get the founders to try slack (since it was all the buzz) and failed. Since nothing was broken, I decided that hipchat was good enough for the team.
Recently, around the beginning of this year, one of my co-founders had become very impressed with slack as a company and as a product. He gave it a whirl and got the team to decide to switch to slack. Personally I wanted to try out slack and with the recent outage they had and friends jumping ship, I was pumped to make the switch.
Gunicorn isn’t just “trendy” it actually works really well, in some cases (like mine) works much better than uWSGI. (also it seems that uwsgi is now becoming trendy, so am I just a hipster for switching to the uncool option :P)
I have always been a big fan of the uWSGI project. It has always been my number one choice of deployment of python web apps, running behind nginx as a reverse proxy. I have always checked to see if there is anything better out there and have always decided to stick to uWSGI. Data like [Nicholas 2010] [Kgriffs 2012] [DCramer 2013] made it easy for me to stick to my uWSGI choice and make my argument for uWSGI over the more “trendy” gunicorn [DCramer 2013].