Did you find that the limitless 3.0 collected dust and debris around the cutouts? The slits around the volume buttons are something I've never dealt with. The previous brands I have used Speck and Tech21 didn't have those gaps. I am looking into the limitless 4.0 but I also don't know if the strange MagSafe patterns on the internal back tpu is going to cause scratches or make an imprint of those patterns onto the back of the iPhone 12 pro.
Any slits or openings on a case will allow dust and dirt to get in. I change my case so often that I do not have this problem.
Mous cases are way over rated. The arrive bowed like a banana, make a great fidget spinner, are slippery as a wet bar of soap and have symmetrical cutouts on the bottom for an asymmetrical design. The aramid fiber is a huge fingerprint/smudge/grease magnet.
They are a sharp looking case but otherwise suck. This is only my opinion.
Here's mine which I sold.