Reasons to choose Rails 4.0 over 3.2 -

i'm trying convince colleagues chose latest version of rails bunch of projects starting kinda out of arguments. none of new features exciting doesn't looks it's worth dealing inevitable bugs in rails , gems.

well if use postgres , hstore option store array instead of serializing super nice.

the new activerecord methods makes sense , and irregularities have been attended, stuff returning nil return empty relation, scoping returns relations rather arrays can method chain it.

the new params protection somehow makes sense , used quick.

using concerns service objects nice, can define tag behavior , can included in models makes more sense.

i think rails 4 has matured bit rails 3 in more making sense rather delivering out-of-this-world features.

the 1 thing should if chose either rails4 or rails3 use ruby 2.0, real improvement is, when you're using threaded server see shine copy-on-write bug has been fixed.