This is something really important, especially in the days when music and film vanishes from platforms one by one. I myself have three playlists with greyed out titles (titles are missing so there's no possibility for me to find out what was there).

That's why I divide music to the one that I want to have forever - I buy it on CDs - and dance music that I can live without one day

I really appreciate platforms that still show the titles and metadada after something is removed. Then at least I can go find it again to maintain my collection. Tidal does this.