Old thinking is to keep adding processing power in stead of optimizing algorithms. 
For lorawan gateways processing power is not the bottleneck (when looking at RPis). Memory can be tight at times.
If the AI crowd requires more processing power they will have to wait a couple of years. Current mobiles have over 100 times the processing power of my first PC.
A worry is the environmental impact of all our IoT devices and smart phones. Where I drastically reduced energy consumption of our household some years ago I notice an increase over the last few years due to smart assistants, smart lights (always using a little power in stead of an on/off switch) etc etc