Tamil has the largest users in internet[1]. It does enjoy the highest adoption.
1. https://assets.kpmg.com/content/dam/kpmg/in/pdf/2017/04/Indi...
1. https://assets.kpmg.com/content/dam/kpmg/in/pdf/2017/04/Indi...
well, I will not go there! But the absence of Telugu font in talking about Indian fonts is eerily disconcerting.