OP
Those that wheel in parts of the Canadian Shield and here in Alaska understand that relocating the airbox intake for certain trails is definitely a required modification. Just go back and watch Ultimate Adventure 2019. Up here it is not overall depth that gets you it is the vertical entrance to the water crossing that will put the airbox intake under water until the ass end of your rig settles down. So just doing a cowl intake mod may actually get the job done in most cases but not everyone wants to go DIY so they buy a snorkel kit. It is just one part of an overall plan that needs to be in place like making sure gearbox breathers are adequate and taking time to do some preventative maintenance like using connector grease on electrical stuff (which Jeep did a lot better on the TJ than some on this forum give them credit for) and also understand that you need to step up your after trail maintenance as well.
Good points.