The rationale of &quot;declining usage&quot; could be a bit misleading. Two thought processes:<p>1) Tab groups are disabled by default on clean profiles (you have to move it out of the &#x27;customise&#x27; menu), so tab groups are used by more advanced users, and more advanced users are more likely to be disabling telemetry. Combined, any usage statistics are pretty meaningless.<p>2) Hiding functionality by default will mean it gets used less. Showing functionality by default (Hello, Pocket) will mean it gets used more.