The Vice Presidency was never good breeding ground for Presidential nominations since the Civil War.
Only John Adams, Thomas Jefferson, Martin Van Buren and John C. Breckinridge were nominated for President before the Civil War, with all winning the Presidency, except for Breckinridge, who had been Vice President under James Buchanan from 1857-1861, and then nominated by Southern Democrats who refused to accept the official Democratic nominee, Stephen Douglas in 1860.
The only Vice President from 1860 to 1960 who was nominated for President was Franklin D. Roosevelt’s third term Vice President, Henry A. Wallace, who ran as the Progressive Party nominee for President in 1948 against his own successor in the Vice Presidency, President Harry Truman.
But since 1960, six Vice Presidents have run as Presidential candidates, including;
Richard Nixon in 1960 and 1968
Hubert Humphrey in 1968
Gerald Ford in 1976 (who had succeeded Richard Nixon under the 25th Amendment)
Walter Mondale in 1984
George H. W. Bush in 1988
Al Gore in 2000
Nixon and Bush won the Presidency, while Ford lost a full term after finishing the partial term he succeeded to, and Gore won the popular vote, but failed to win the Electoral College.
The point is that Joe Biden would be the 7th Vice President who ran for President after serving as Number 2 in the executive branch.
And Nixon the first time, Mondale, Bush, and Gore all had a jump start on the nomination of their party for the Presidency, with only Humphrey and Ford having major challengers.
So at least by recent history in the past half century plus, being a Vice President gives a leap forward to those who wish to run for President.