Hey Friend. I just changed the silica about a week or two ago. It was getting pretty ragged. But the coil is none the worse for wear. It started at 1.9 ohms and it stalled at 2.1 and holding. You're right, there's no reason why it can't last a long, long time. I figured everyone was trying every imaginable build mankind can think of so I thought I'd try something unique...see how long I can make a coil last. Oddly, I've received interest from people who like the idea as they are not fiddlers but want to be able to enjoy a top end juice burner like the Kayfun. So when they see I have a five month old coil still going strong they become interested. Just shipped some premade coils to one gal who just sprung for a Provari and Kayfun. All she has to do is screw it on the thing and she's good to go. She simply does not want to mess around with building. There are niches ll over the place and I just happened to fill one of them. I had my fun with rebuildables. Now I just want to vape.