Conventional and attribute routing

Question

i know attribute routing is inline and handy but i need some reason for which people will prefer attribute routing instread of Conventional routing.

 

1) so please mention few point which explain the advantage of  attribute routing

 

2) is there any route which only can be build by attribute routing and not possible by convention routing. if yes then share some attribute routing sample which can not be build by 

convention routing.

 

looking for details answer. thanks