This is a great move and incredibly employee-friendly. We'll see if this is the beginning of other companies following suit, but I doubt it.

As has been discussed before it's not the mechanics that matter here, but rather the psychology of founders.

More often than not, there is the belief that even if you've been an employee for 2+ years, if you're not "in it for the long haul" then you don't deserve to hold on to your equity without paying for it in cash (or taking the tax hit).

Not to mention there's very little incentive to amend these policies outside of generating general goodwill.