I recently got one for the times I need to throw shit up top for trips with snowboards or camping chairs, firewood, gas can etc. Probably will only get used a handful of times a year but when you need it, it’s available for that.
Also eventually putting some dust lights on it too, which provides a nice spot for them. One of my old pre-Tacoma prerunners had a bed hoop that I put a KC amber light on, which is the perfect spot and 4Runners just don’t have that option. The swingout bumper I have yet to put on could be rigged for one I suppose but it would most likely have to be mounted lower than I prefer.