Consider adding a notice to discourage IE11 usage

[youknowriad]

For PHP upgrades, nudging users to update their PHP version proved to be successful.

Maintainability cost of IE11 (In terms of time, bundle size and a lot more) is very high and IE11 is approaching the 1% threshold in its usage worldwide ​https://caniuse.com/usage-table

I think we should consider adding a notice to discourage its usage.

[johnbillion]

This sounds like it should be a meta ticket to add a message to Browse Happy that shows up to IE11 users. See wp_dashboard_browser_nag().

[youknowriad]

@johnbillion I created this ​https://meta.trac.wordpress.org/ticket/4863 should we close this one?

[afercia]

Now that the browsehappy API has been updated (see ​https://meta.trac.wordpress.org/ticket/4863) the dashboard notice "nag" will be displayed to Internet Explorer 11 users. See attached screenshot.

The notice message needs to be updated as it still refers to:

• "you're using an insecure version of Internet Explorer"
• "Update Internet Explorer"

[davidbaumwald]

This ticket still needs a decision and possible patch, and with 5.4 Beta 1 landing today, this is being moved to Future Release. If any maintainer or committer feels this can be included in 5.4 or wishes to assume ownership during a specific cycle, feel free to update the milestone accordingly.

[netweb]

Related: #49696 Define guidelines for minimum IE support

[sabernhardt]

option: unlinking the IE logo

[sabernhardt]

48743.diff simplifies the message for Internet Explorer. While editing this, I also inserted the browser name as alt text for each linked logo image.

It may be worth removing the link from the IE logo, leaving that specific logo with an empty alt attribute. Its downloads page highly recommends switching to Edge, but the page is still technically for downloading IE.