I'm a long time django user. I love django. I've used it in production apps. I like to try out new languages as a hobby and so I got myself the programming in scala and the Play framework in action (manning). Just trying out Play however I can't seem to get this feeling that I could do it more easily and faster in django, though that may be because I'm comfortable with django and python. There are also a ton of django apps that I can leverage to build out parts of my app. I'm not sure about the play ecosystem in that respect.
I'm also specifically looking for advantages that the language itself can bring but since I haven't gotten very far I haven't discovered any yet but I'm hopeful that I will be pleasantly surprised.
Having said all that I just saw some play love coming from LinkedIn: http://engineering.linkedin.com/play/play-framework-linkedin
>> You clearly can't afford to explore all reasonable options. How else would we know which one to go with and save extra bytes?
Lift/Play are surely not outdated. I am just stating objective facts that led us to one over the other.
Read both the articles we have posted to get a flavour :)
Coming to django, I would argue that it is the best documented project on this planet! Django has a huge number of plugins, quickens the process, and is based on some amazing philosophies(DRY) and you happen to admire what a big deal it is when you go deep into design of your web app.
Also, I can even argue that I can get a programmer who doesn't know python to start on Django in 4 hours. Now, I wouldn't bank on this point as it is a language ecosystem point, but it is a true fact, happened to me some years ago.
Lift, is cherry picking features from django/rails, which is actually a good thing, but I see it being a lot less progressive as compared to Django even at the scale at which Django is right now.
Play, I haven't used, so cannot argue much on that. I think Play2 is less than a year old? Surely, I cannot let my startup developers write more bytes than necessary. Why code something which is already done and that is precisely what happened with us when we started working with Django. Well tested libraries can be pip installed.