The tournament opened with Italy shocking Scotland in Rome to put Gregor Townsend under pressure.
His side then delivered an emphatic win over England at Murrayfield to end their rivals’ 12-game unbeaten run.
The pressure then mounted on Borthwick as his side were outclassed by Ireland at Allianz Stadium.
While all that was happening, France cruised past Ireland, Wales and Italy to start a narrative that anything other than a Grand Slam would be a failure.
Scotland then blew away Galthie’s side, before conceding a late flurry of tries, to head into the final round with a genuine shot of a first Six Nations title.
To add more drama into the mix, Italy overcame England in Rome to mount further pressure on Borthwick.
Wales may have lost their opening four games, but they improved as the championship went on, producing an impressive bonus-point win over Italy to end the tournament.
They finished with a third consecutive Wooden Spoon – but a first win in the championship since 2023 offered huge relief.
Despite an improved display in Paris, England finished the tournament with four defeats – their worst-ever campaign.
“It was one of the most captivating Six Nations in history, fitting it came down to one final moment of drama,” BBC rugby correspondent Chris Jones said.
The 2015 Six Nations has been regarded as the greatest tournament for entertainment because of the three-team Super Saturday title race.
It similarly went right down to the wire.
However, this year’s competition delivered from round one right to the final kick, with each nation having their own story – and leaps to the top of the list.