Very true, bandwidth is very expensive today. Some comments to your post:<p>- Actually, and quite surprisingly, the &quot;cache everything&quot; mode only adds around 25% of used bandwidth in practice. But even 25% is already a big difference if you pay 10 or 50K of CDN bills per month.<p>- Indeed useless bytes download can create overall congestion brings harm to the network in general, and should be avoided. It&#x27;s especially true for websites that don&#x27;t have the money to pay big CDNs and stream with dedicated server with limited capacity.