Quivers are important ways of carrying lenses. With a lens case you can easily make sure that you can transport everything in one piece. You can easily attach these bags to other bags and thus a safe lens change is guaranteed.
These small containers are perfect for further transport with a suitcase or a backpack. You can put them in a suitcase without any problems and everything is stored safely. If you don't have a case, you can also attach this quiver to other bags or even hang it around your shoulder so that you can get going faster.
Like any bag, it has its disadvantages. In this case, a quiver often gets in the way when you're in the middle of a "photo shoot". Everyone has had this problem. "You're busy, you're in a shooting frenzy and you've got a bag around your shoulder and then it can get in the way very quickly because it keeps sliding forward unintentionally."
Because these lens cases are compact, you can't very well put it aside or just slide it on your back. It would keep sliding forward. Another disadvantage is, you can't pull the lens out that quickly.
The lens is fixed in the quiver, so it can't slide. For this reason, it is a bit more difficult to get the lens out again.
Therefore, it is not possible to change the lens so quickly. Nevertheless, every photographer should have as many cases as there are lenses in order to guarantee optimal storage of the various lenses.