![]() ![]() But I don't like sinking money into expensive upgrades on older computers. Now if you really need 1TB, that would be a problem I suppose. The 2011 machine was great, but the newer ones are really much better. It made solid-state storage (SSD) standard, upgraded to USB 3.0, added an additional Thunderbolt port, added HDMI, and included a high-resolution Retina display. A new machine would include a one year warranty. That is getting close to the end of the expected battery life IIRC, and other things can start to fail as the computer gets older. On top of all this, you are comparing a new computer to a 5 year old model. The 802.11ac wifi on the new machines is probably 5x faster than the 2011, and the SD card slot is also much faster on the new machines (in 2011 the card slot used the slow USB 2.0 bus). Inexpensive USB 3.0 disks will give you speeds in the 100-200MB/sec range on the new machines. Also, the 2011 has slow USB 2.0 such that external disks max out at about 30MB/sec. The processor speed is not the big difference, it's the efficiency, which gives the newer machines dramatically longer battery run times - perhaps twice as long as your 2011 MBA. For starters, you have greatly over-simplified the difference between the 2011 and current machines. If you are completely happy about everything on the 2011 machine, I guess the SSD upgrade might be worthwhile.
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