How to sort shadow tags in descending order of most recently created?

1 
<table>
	<$list filter="[tags[]is[missing]!is[shadow]] +[sort[]]">
		<$vars count={{{ [<thistag>tagging[]count[]] }}}>
			<tr>
				<td><$macrocall $name="tag" tag=<<thistag>> /></td>
			</tr>   
		</$vars>
	</$list>
</table>
2 
<table>
	<$list filter="[tags[]is[missing]!is[shadow]] :sort:date[get[modified]else[19700101]]">
		<$vars count={{{ [<thistag>tagging[]count[]] }}}>
			<tr>
				<td><$macrocall $name="tag" tag=<<thistag>> /></td>
			</tr>   
		</$vars>
	</$list>
</table>

try this

3

As this illustrates many tags that come into existence as shadow tiddlers that are used to tag something, exist on tiddlers with no created or modified dates. The idea was to save the space where it was considered unnecessary. Sadly if I were around at that point, I would have encouraged the use of an efficient pseudo date so we could see when such tiddlers came into existence such as with a wiki release date. eg TiddlyWiki version with a date lookup for that release.