Presenting at Eurovision has changed radically over the years.
It used to be a one-person job (with occasional forays into two) from 1956 all the way until 1993.
Then two presenters became standard from 1994 to 2006 (with 1995 being the last gasp of the solo presenter).
Now it’s pretty much standard to have three.
More than numbers of presenters, the role of the presenter has also changed. (You can read AJ’s view on the evolution/devolution of presenting Eurovision here.)
Whereas before, the presenter was the glue that held together disparate performances and the disembodied voices of jury spokespeople, now the presenter almost has to fight a battle with spokespeople keen to get their time in the sun in front of the hundreds of millions of viewers worldwide.