“People are change averse,” Duolingo’s CEO Luis von Ahn said when users revolted against the app’s 2022 redesign. He refused to offer a revert option. The backlash was just resistance to change, and users would get over it, he argued.

Dora Czerna, writing for UX Collective, makes the case that von Ahn got it wrong. Users weren’t afraid of change. They’d lost something:

That old interface isn’t just a collection of buttons and menus–it’s ours. We’ve invested time learning it, built workflows around it, developed preferences and shortcuts. The new design might be objectively superior in controlled testing, but it requires us to surrender something we’ve claimed as our own.

That’s the endowment effect applied to software. The hours you spent learning an interface have real value, and a redesign zeroes them out. Calling that “change aversion” dismisses the investment.

Czerna points to Sonos as the worst-case scenario—users who’d spent thousands on home audio systems suddenly couldn’t adjust the volume after an app update. But even smaller changes trigger the same psychology. Google changed its crop tool from square corners to rounded ones and got enough backlash to reverse it.

Czerna on what happens when you tell users the new version tested better:

Telling users “we tested this, and it’s better” when they’re actively experiencing it as worse creates a disconnect. Acknowledging that change is difficult, explaining what you’re trying to achieve, and being responsive to legitimate concerns about lost functionality builds more goodwill than insisting everything is fine when it clearly isn’t.

What’s less common is teams treating the transition itself as a design problem worth solving. And of course it is.