'friendly to owners/unfriendly to employees' is pretty much the main trade off dimension in the whole topic. All that follows seems trivial after we acknowledg

'friendly to owners/unfriendly to employees' is pretty much the main trade off dimension in the whole topic. All that follows seems trivial after we acknowledge that interests of employers and employees don't align, but for the sake of clarity: it creates a 'reward' scenario for employee that isn't a 'reward' scenario for employer (further, compared to vesting taking place at all). Buying party loses asset in a form of trained employee motivated to increase company value, which lowers the value of acquisition. Nobody wants to lose money.