RE:RE:Embraer order That's the problem. Bombardier doesn't have the cash flow to start another program refresh. Until 2025 they can and are probably looking at design options right now. After 2025 when they have reduced good amount of debt and have more cashflow then they can spend. Design part is not expensive, its when prototype starts build then it will get expensive.
If they share the same fuselage and tail section, flight deck, landing gear then the most expensive part will be the wings. The more the Challenger replacement shares parts and designs the cheaper it will be for production ramp up too. It can be build on same line in Toronto.
Engines expensive is on the engine maker But we already have many new efficient engines from GE/Passport family and PW/PW800 engines so they are ready with the engines.
Dassault 10X will take some market share specifically those who are up gauging from current Dassault aircraft. I read on a buzz jet magazine that the market share taken by Dassault from Gulfstream and Bombardier at that market size is not enough to cover the increase in demand. But Dassault is now a key player. However they have created a wider and taller cabin aircraft that comes with weight penalty and aerodynamic drag. Range and field performance will already be below Global 8000. Less airports will be available and cost of running will be expensive. Just making bigger aircraft is not a solution. AB and BA both have 737 and a320/a220 based bizz jets and they are not market leaders. They operating cost is high and range is much less. Dassault will run into similar problem when compared to Gulfstream and Bombardier. But Dassault will get European and French customers and anti North American customers who will go to Dassault.