What use are most PMs really? My 7 year old can do a fooking Gantt chart.
Is it a case of those with the talent earn the big bucks and those who can't PM?
In any case most ex and current PMs come across as thick as pig-tulip.
It's becoming the case that senior devs increasingly take on the PM - that makes sense as they'll understand the issues and can even get their hands dirty if needs be.