Definitely not as many available jobs. Every company in the Valley seems to be looking for engineers by the truckload, but there are not so many openings for [people|project|product] managers. Apparently, engineers now self-organize and products simply leap from their fingertips onto store shelves.
As for job security, I guess I'll find out eventually. My gut feeling is that in software companies, it's easier to get laid off/fired as a manager, and it's the opposite in companies where software/IT plays a peripheral or supporting role.
If you think you can replace managers with Trello, you clearly have had some very awful bosses in your career.
I don't need anyone to tell me to keep working on my TODO list. On the other hand, someone who grasp the big picture is useful to have around to tell me in what order to tackle the task in the TODO list. Its even better when said someone has the clout to go poke a 3rd party that is blocking me so I can keep working on the TODO list.
But the very best managers I have had are the ones that are willing to bite the bullet and say "No, X cannot go into the TODO list as it is now. Let's work together to define what realistic actionable items need to happen for X to be accomplished and then we can put those in the TODO list."
As for job security, I guess I'll find out eventually. My gut feeling is that in software companies, it's easier to get laid off/fired as a manager, and it's the opposite in companies where software/IT plays a peripheral or supporting role.