Long ago, at school, there was probably an English lesson about how and where to break text into paragraphs.
As I remember it, the idea was that one thought meant one paragraph, like this in a story from the Guardian:
“The Gambia is in financial distress. The coffers are virtually empty. That is a state of fact,” Fatty said. “It has been confirmed by technicians in the ministry of finance and the Central Bank of the Gambia.”
There are two sentences there, but they both relate to the question of how much money may be missing in The Gambia.
Compare that to the same thought in the Daily Mail:
But amid growing controversy over the assurances offered to Jammeh to guarantee his departure, Barrow aide Mai Fatty said the new administration had discovered that millions had recently been stolen.
‘The coffers are largely empty,’ he told reporters in the Senegalese capital Dakar.
Here, the Mail is applying what seems to be the modern trend, particularly in online articles: the end of every single sentence is a sign to hit the enter key and make a paragraph.