Hi,

1. No idea on changing topic title. We own CreativeMachines.
2. No point to discuss ....
3. Well, we are in Europe / UK.
4. Its not more optimal, most people prefer 3.0mm - its about availability of both filament and parts for extruders / hotends. We sell 90% 3.0mm hotends compared to 10% 1.75mm hotends.

You are making 1.75mm as its 'easier' - doesnt mean that its the correct option (for Europe / UK). Although in fairness, there is a market for both.