Confused about the point of hot swap hard drive caddy "handles"
I'm in the process of designing a custom chassis to 3D print for my NAS, and the more I look at reference cases, the more trouble I'm having understanding the logic behind the design of a lot of common hot swap HDD trays/caddies.
It seems like a common feature to include is a spring-wound door that opens when you press the eject button (see image below). Every source I can find says they're handles, however in quite literally every instructional graphic, photo, or video I've found, the subject seems to attempt to pull the caddy out almost every way you can think of EXCEPT by this 'handle'.
Across all of the different trays I've seen that include this, I legitimately don't think I'd have ever arrived at the conclusion that any of them were intended to be a handle if i hadn't been told that's what they were. Quite a few I've seen look pretty flimsy and also seem like they'd create a lot of additional manufacturing effort.
On top of that, I've seen plenty of caddies that have a similar release button, but with finger pockets/grips on the front that you can pull instead, which seems to make far more sense in my mind.
So what exactly am I missing? I can't imagine so many companies chose this design if it didn't have some significant benefit or functionality.
