In addition I'm sure airlines not flying the MAX will be using that fact as a marketing tool (i.e. we only fly Airbus etc) so you could limit your bookings with just those airlines.
As an example of this, here in Australia I know one of the carriers is planning to fly the Max some time next year.
If they go ahead with that plan, I will be making sure not to book with that carrier at least for the next few years.
If that's correct, aren't there possible risks for flying a plane that had such a long period of inactivity?
This is the really big problem Boeing now faces.
For these planes to fly again they need to be certified safe to fly again.
However since the FAA was one of the last authorities to ground the plane, it really does not matter what outcome they achieve in their current investigation.
Other aviation authorities around the world will take their own time to investigate if the plane should be allowed to fly.
The conundrum for Boeing is it wants the plane back in the air ASAP but I'm sure many of the world aviation authorities are in no real rush.
I always do this anyway just out of curiosity. Also if it's a plane I enjoy flying on it makes me look forward to the trip that much more. I have to admit that if I spotted "737 MAX" on there I seriously doubt I would book that trip, even after these issues are eventually resolved.
Answered your own question. Assuming Boeing doesn't just scrap this, most airlines will operate either it or the A320neo, not both.
The new plane might quickly turn into a internet meme.