It's like with Google (or Amazon, or Microsoft) - you can disagree with their policies and business practices, but you can't avoid them. It is physically impossible to use internet without these monsters. https://gizmodo.com/c/goodbye-big-five

Is boeing really the only producer of aeroplanes?

My guess is there are others. My guess is that orders will be cancelled and there'll be a shift towards airbus (oh!there's one!)

I'm tempted to apply my first ever downvote to this apparently witless comment, but perhaps you meant something more subtle?

Orders can't just be shifted to Airbus, as their production lines are fully loaded for years to come. Also, there is little desire to make Airbus a monopolist. The problem basically started when Boing was merged with McDonell Douglas, as this created the duopoly which now has the market trapped. And of course it creates a huge amount of problems for all the airlines which ordered and planned for new planes which have the same certificatation as their existing 737.

It feels like we see this over and over when you trace corporate problems back- loss of competition and development of monopolistic conditions. There’s a reason we developed antitrust laws and to watch them be eroded in the modern era is quite worrisome.