The big difference is that 2000 revolved around a disputed recount, in a race with a margin of fewer than 1000 votes. There will be recounts in this race, but:

(1) There's no reason to believe they'll change the outcome much (recounts in 2016 didn't) --- states have learned since 2000 and have moved away from faulty ballot designs.

(2) The recounts will be occurring in multiple states, and Trump needs to sweep them.

(3) The margins in those recounts are much bigger than in 2000 --- tens of thousands of votes, not hundreds.