That’s because of structural changes. These days there’s really no such thing as releasing a single. An album comes out and it’s all on the streaming services and each song gets numbers by themselves. The closest we had to that back in the day was the occasional “single machine” album like Thriller where almost every song wound up released as a single eventually (about a year and half I think). But of course they didn’t release the next single until the previous single started slipping in the charts, not wanting to compete with themselves. If this model had existed back in the 60s probably most Beatles albums would have pulled a similar feat.
Thanks for the explanation. I haven’t kept up with current music for a long time. What I hear is largely a oscillating voice, repetitive, and/or not understandable.