I was chatting to my boss today and he said:
My first job was electrical working in a factory for a modem company. The last model modem we made was the 1200 baud. After that they needed programmable logic and went to VLSI chips. We didn't have the scale for that and so we had to close down.
My question is: What triggered the need for VLSI chips in modems post 1200 baud?