We used to link to several Wikipedia pages, only 2: the English and the native ones.
But it was terrible: pages would be removed, would be renamed, who be later turned into disambiguation pages.
I even have a group whose page was deleted and then later it was for another group of the same name, instead.
We would regularly have to fix links on MB.
We really should no longer link to Wikipedia (WP) but only to Wikidata (WD).
And we should not hesitate too much linking to both song and single.
- Separate Wikipedia articles for single and songs would be boring for readers (us)
- Apparently not possible to link single and song Wikidata to unique Wikipedia article
Not a reason for us to miss the interesting article on single (release group) or on song (work).