I work for a regional ISP, and I can tell you the cost of storage is only one small part. A huge part of it is upgrading all of your layer 3 routers to even ha

I work for a regional ISP, and I can tell you the cost of storage is only one small part. A huge part of it is upgrading all of your layer 3 routers to even have the capability to do this kind of logging; it is definitely not built into legacy equipment so you're essentially dictating that all these companies spend millions or more to upgrade their entire infrastructure. And of course, beyond the hardware, you need a lot of network engineers and software engineers to design and put it all together; its an effort that would and does take many years and is never really complete.