Almost every station until Badlapur will be crowded....Houses in Mumbai is a big deal,too costly for rent and to buy.....So these areas turned out to be cheap and due to locals,it is easy to commute.....No Commercial IT Parks like that is not there until TNA,everything is after that inside Mumbai only,especially from Vikhroli,Airoli(Navi Mumbai)
Only if you go to Mumbai once,you'll get an idea about that...