You may see 7z as a completely foreign format, but I don't. I've seen it used in many places as a replacement for RAR with similar compression.
Supporting JPG is different because it's a lossy format. 7z may be a similar format, but it's still very common - if we were to think of supporting some random image format that had similar compression to PNG but was completely out there, I'd say that we shouldn't. But in the case of 7z, we either should support it or just toss RAR out and make things just ZIP.
Supporting JPG is different because it's a lossy format. 7z may be a similar format, but it's still very common - if we were to think of supporting some random image format that had similar compression to PNG but was completely out there, I'd say that we shouldn't. But in the case of 7z, we either should support it or just toss RAR out and make things just ZIP.