The adoption will not improve much until and unless the cellular rates are hiked which is very much required considering the pathetic state of data networks in India.
It's about disposable incomes and average usage. My ISP provides 1 Gbps unlimited without any caps for the equivalent of 4400 INR a month. Compared to the average wage in the UK, that's not too much, so 80% of the people take this plan, even boomers who only watch Netflix on their TV. As a result the ISP doesn't care if 0.1% of the people use 20-30TB since there are lots of low usage people to balance.I guess so but not sure. I have only dealt with Hetzner unlimited Gigabit servers (yea its diff from residential connection as its in a datacenter) but you can upload/download as much as you want and they dont care. The whole server is like 30 Euros a month.
Meanwhile, in India servers that come with Gigabit usually have data caps and cost a ton.
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I don't think it will choke the network (its ffthTruly unlimited is not feasible simply because as soon as it is offered there will be a small number of people who will abuse it and choke the network for the rest of the users.