Everything is more important than that... until it's not. People don't know what they really care about until their assumptions are unchecked. When nobody HAS

Everything is more important than that... until it's not. People don't know what they really care about until their assumptions are unchecked. When nobody HAS to use their phone for certain online actions, those actions likely won't be optimized for mobile, and people will care much more about popup tooltips, navigation, color scheme, logos and branding, extra random reporting, etc. Once people are forced to use mobile and it's not a couple minute experience once every week or month, then page load speed (and initial page payload size for SPA) become very important to those people.