In simple economics, a decrease in price typically results in an increase in demand, unless the demand is inelastic.

Anecdotal experience: Onset of tools such as NumPy, which made it more feasible for a wider range of people to write their own simulations due to drop in cost (time/complexity). This, in turn, increased the demand for tooling, infrastructure, optimisation, etc. and demand for software engineers increased. Yes our jobs will change but there are way to many problems to be solve to assume demand will not increase.