Cisco is ever so slowly increasing its investment in edge caching specialist Qwilt, recently partaking in the $70 million Series E financing round which took Qwilt’s total raised to $134 million. While the size of Cisco’s stake in Qwilt is private information, we have to ask ourselves why doesn’t the network technology giant just take the plunge by acquiring Qwilt – considering the latest investment was made with Qwilt’s “exciting inflection point” in mind? The first answer that springs to mind is that an outright takeover would turn Cisco into a video business once more, three years since it sold off its TV technology arm to form Synamedia. Returning to the video software sector would therefore raise more than a…