I have a TC from 2010 - would I see any benefit in getting one of these? I use it as a bridging device (I have a last year imac and this year MBA) and Telstra cable (sorry I know nothing about this stuff)
The wifi reception on the newer models is better, so even if you don't have any AC wifi devices you may see better wifi reception. If you are in say a small apartment and have good wifi coverage now though, there is not much reason to upgrade.