I don't think 'no managers' is a good idea. There are managerial 'things to be done' in every project. As a thought experiment, if management were 'just a role

I don't think 'no managers' is a good idea. There are managerial 'things to be done' in every project. As a thought experiment, if management were 'just a role' and people could switch into for a period of time and then go back to their 'real jobs' with no loss of pay or prestige, that might lead to some interesting effects. (warning, anecdata:I've worked on teams where the 'manager' role was cycled among engineers/testers/designers etc throughout the project lifetime, and it worked well. I've also seen managers come back to being full time developers, and their perspective from the time of being managers really helped with their effectiveness as developers)