Drastically reduce is a misnomer in the context of farmers. What's replaced is the labour intensive part of farming. The decision making activities at the top of the pyramid remains.

Same goes for software, from the inception of the IT industry, automation is the name of the game. We moved from automating number crunching, record keeping to more value added activities and the pace is quickening.

On the other hand, there's more opportunities for applying IT opening up every day. Also the systems become mind bogglinly complex, you need more cognitive inputs to maintain.

IT would become another technical capability for other human activities, just like medicine, electricity, machines... and pushed to the relam of "techie" in the years to come. In fact it's already happening.