The Sonnet Echo 21 Thunderbolt 5 SuperDock , the follow-up to the similarly named Echo 20 Thunderbolt 4 SuperDock ( review ), lets you add tons of I/O to your Mac via a single Thunderbolt cable, and brings several noteworthy improvements for those looking to upgrade or future-proof their Mac setu...
Source: [9to5Mac](https://9to5mac.com/2026/08/26/sonnet-echo-21-thunderbolt-5-superdock-review/)