inputMultichannel input capacityexpand_more0 mentions
Users highlight being able to connect keyboards, guitars and multiple vocal microphones at once, something smaller Scarlett units couldn't handle. This is seen as the key reason to upgrade to the 18i16.
Strongly positive
usbRuns great on bus powerexpand_more0 mentions
Contrary to some confusion, the 18i16 can be powered directly from a USB-C port without an extra power supply, even with mic preamps engaged. A user confirmed this works reliably on a MacBook Pro for multi-mic recording.
Strongly positive
starConsidered a top-tier, do-it-all interfaceexpand_more0 mentions
Multiple commenters call it the perfect interface or say it's huge in the music world, meaning you won't need anything else. One user recommends having more channels than needed just in case.
Strongly positive
tuneUpfront gain control on line inputsexpand_more0 mentions
A user who tried the 16i16 switched to the 18i16 specifically because it lets you control and add gain upfront on line level inputs, rather than relying on software gain staging in the DAW.
Widely praised