It’s been four-plus months since Experimental results part I. All reports point to The Experiment being a success so it’s time to make it permanent. Today I checked in a change that defaults to opting-out of the troublesome disk-costing dialog box. It’s still present but by default will not be shown. If you’re using a stock dialog set, there are no changes you need to make. If you’ve built a customized dialog set, remove the WixUICostingPopupOptOut WiX variable definition from your dialog set fragment or you’re likely to get an error message at link time:
The Windows Installer XML variable ‘WixUICostingPopupOptOut’ is declared in more than one location. Please remove one of the declarations.
You can opt back in to the disk-costing dialog box by providing a value of 0:
Look for this change in next Friday’s builds of WiX v3.5 and v3.6. (Any build more recent than yesterday’s v3.5.2208.0 and v3.6.1008.0 will have it.)