I don't notice app logos at all. Tell Alfred to open Slack or search my phone apps for Slack. Or even browse alphabetically to the S apps and click the Slack one. If it weren't for the Mac App Store telling me I needed to close it for an update, I wouldn't have noticed :P
The new logo does look kinda silly against the dark mode App Store with the dark purple, though.
Interesting; despite having zero design experience/knowledge, I typically arrange my apps pretty neatly and then get used to the visual cues based on each app of the page (like muscle memory or something).
My Mac dock is also sorted alphabetically rather than by use or style. While it is muscle memory-like that I know roughly where on the dock is IntelliJ, I still open iTerm accidently frequently. Totally different look of their icons, but I go by position and name more than appearance.
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