Your example of engines is an excellent point. Repeat that story 100 times to begin to understand the enormous difficulty. Which is to say, it won't be easy. I hope I didn't communicate that I thought it would be easy.
The story of Bombardier is maddening because it demonstrates that if you achieve unbelievably great things technically, you can still be assassinated by a million other attacks. The non-technical parts are what really seem to make this all a non-starter. But victory belongs to the bold.
And wouldn't it be a worthwhile ride to spend the next 20 years building incredibly cool stuff that eventually fails for whatever reason? Sign me up.