Absolutely. Pre-GST business could get by without computer/online. GST works online ONLY. This will result in short term pain and cost but bulldoze all these guys online. Companies like ClearTax (YC) will make a killing.
Invoices can be generated manually. Internet is required only to file the returns.
https://twitter.com/adhia03/status/881428128177901570 - Revenue Secretary, MoF
This is some day dreaming.
In a city like Bangalore, if it rains an hour. There are power cuts of up to 12 hours. Expecting people to invest in long back up UPS, internet infrastructure in every single part of India is bonkers.
To start with fix basic infrastructure first.
What's happening today is putting cart before the horse.
How long will this "short term pain" last?