Emergency building escape mechanism - GIF and video

[Frank S]

Everyone would be dead before the 3rd person made it to the ground. I have seen these devices in China at a trades fair while the concept may have merits for persons with disabilities they are weight activated and a small child may not be heavy enough to overcome the counter weight or the spring depending on design that raises the empty platform back to the upper position, additionally only 2 adults or 1 adult and possibly 2 smaller persons can be lowered at a time
the old saying when seconds count minutes kill holds true to form on these architect gimmicks