I'm curious, do you know of examples of companies that lost their best engineers despite reversing course on a shitty policy?
My understanding is that people want to pay the bills, and esp. in this economy, most prefer to have a job rather than searching for a new one. That ofc is different for the more senior engineers who are in demand, but the junior ones will probably still stick around despite the management's policies.
There is a time span between the policy is comitted internally and the time that policy is reverted. In Synology's case it's probably more than half a year, in other companies it could take a full year or more to reverse course.
Half a year is plenty enough to move away.
Of course people don't like looking for a new job, but they don't like shitty leadership either. And speaking of paying the bills, you won't get much of a bonus or promotion when profits are plunging, so moving away earlier than later is usually a good idea.
At the very least, some people who otherwise wouldn't have actively looked for other opportunities might start doing so. This can have consequences several months down the road, even if they don't quit immediately.
My understanding is that people want to pay the bills, and esp. in this economy, most prefer to have a job rather than searching for a new one. That ofc is different for the more senior engineers who are in demand, but the junior ones will probably still stick around despite the management's policies.