I think you don’t understand how indian political system work. In India the Prime minister is elected by the people and has a similar position to the President of United States.
Modi’s party got majority seats in the previous election.
The President of India is more of a ceremonial role. It is one of the duties of the President to appoint the Prime minister. In this scenario the President really doesn’t have a choice.
For some reason they just don’t want to give up.
A lot of places still use it, they don’t know about LibreOffice. They also don’t understand that it’s not being updated.