Firstly, this isn't a shoot-out. I apologize if the title feels that way. It's our account on why we chose one(language) over the other looking into various real-life variables, not just web frameworks.
>> 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Lift/Play are surely not outdated.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 :)