[wp-trac] [WordPress Trac] #64266: Core Menu Icons disappeared in WordPress 6.9 RC1 using Safari Browser 15.6.1

[WordPress Trac]

#64266: Core Menu Icons disappeared in WordPress 6.9 RC1 using Safari Browser
15.6.1
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 Reporter:  codex-m         |       Owner:  (none)
     Type:  defect (bug)    |      Status:  reopened
 Priority:  normal          |   Milestone:  6.9
Component:  Administration  |     Version:  trunk
 Severity:  normal          |  Resolution:
 Keywords:                  |     Focuses:
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Comment (by desrosj):

 @codex-m small request for the future, please upload the images directly
 to Trac. If an external image hosting site shuts down, this ensures that
 the images are always accessible in the future.

 I did a bit of research to try and decide if we should revert this change.
 Here's what I found.

 I looked into finding some usage statistics for Safari 15.6.x. Usage seems
 to sit at 0.167% according to the `caniuse-db` package, which is
 accessible [https://browserslist.dev/?q=U2FmYXJpID4gMTU%3D visually
 through this site].

 I then looked at the which version of MacOS was blocked from upgrading
 past this version of Safari, and that is a more complicated question.
 Statcounter's [https://gs.statcounter.com/macos-version-market-
 share/desktop/worldwide desktop MacOS version page] has a large note at
 the top:

 > Apple are incorrectly reporting all macOS releases since Catalina 10.15
 as Catalina 10.15. You can read more about it here.
 > We can't correctly show usage for Catalina 10.15, Big Sur 11, Monterey
 12, Ventura 13 or Sonoma 14 until Apple fixes this.

 I next tried to find statistics for iOS versions, and which devices were
 blocked from updating to newer version of Safari. Wikipedia has this:

 > iOS 15 is the final version of iOS that supports the iPhone 6s & 6s
 Plus, first-generation iPhone SE, iPhone 7 & 7 Plus, and seventh-
 generation iPod Touch, as its successor, iOS 16, drops support for those
 models.

 I couldn't find good data about the percentage number of iOS devices by
 type, but [https://gs.statcounter.com/ios-version-market-share/ I found
 iOS version data]. Based on this, ~5.4% of all iOS traffic is on a `15.x`
 version of iOS.

 I don't think we can reasonably rely on the data here and have to assume
 that there is 5-8% usage to be conservative. When applied to WordPress at
 scale, just 5% is millions of sites.

 Another aspect to this is that the Classic Editor uses Dashicons for the
 TinyMCE buttons. If the Dashicons font is broken, then that is completely
 unusable.

 Given all this, I think that reverting the changes to `dashicons.css` for
 6.9 makes the most sense to me.

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Ticket URL: <https://core.trac.wordpress.org/ticket/64266#comment:5>
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