there's enough support for it across various things that it's not going anywhere
So is Webdings: https://www.dafontfree.io/webdings-font/
Webdings even got integrated into Unicode 7.0, so all the Noto fonts support it: https://en.wikipedia.org/wiki/Webdings
And recode(1) has full support for ISO-8859-*. As does iconv and the Python3 encodings.codecs module. I'm pretty sure browsers can render pages in them, too. Firefox keeps rendering UTF-8 pages as if they were ISO-8859-1 encoded when I screw up at setting the charset parameter on their content-type.
That's the point. Think again.
With Nerdfonts, these will be obsolete in further Unicode releases.
GNU Unifont and the unicode table might be backported to the Amiga. With NerdFonts, you need to do twice the jobs.