Digital Circuit

low power consumption

easy design

less error

gr8 bandwidth requirement

stable

etc

There are still some applications where analog is either better or cheaper or just does it good enough and has done for years!!

Without more exact detail of any particular application that you have in mind, the two answers you have from CR4, just about sums it all up!!!

Digital radio communications have the advantage of maintain a high signal to noise ratio right until the moment that they fade out completely while analogue signals deteriate in s/n ratio when they get weak but do not disappear completely so that some information may be derived from them under poor conditions.