I get the advantage of collective bargaining for workers, but I still can't help but think that unions also add a lot of inertia and generally just have a dampening effect on agility, individual contribution, risk taking, etc. which is opposite of what you want for a software shop.

Maybe I'm wrong, and perhaps abusive megacorps really do need unions in place as a check against corporate power (never worked for one). I guess time will tell.