The difference between then and now was that Gore put the country before himself and conceded.

You can be unhappy with a result, and maybe even see a path towards changing it, but at some point politicians owe it to their country to support its core democratic institutions.

Clearly and publicly accepting well-audited voting results should be first requirement for presidential candidates.

(Said as someone who has thoughts about the 2000 election, but respects what Gore did as a patriotic choice)