And before that it was the #1 result for most Google searches.
Not "most searches." Wikipedia was (probably still is!) the the most common #1 result.
"#1 result for most searches" would mean 50% of all searches would have Wikipedia up top, and no site clears that bar.
That’s incorrect. If there are 10 websites competing for #1, Wikipedia could show up twice in 11 searches while the others showed up once.
"#1 result for most searches" would literally mean that I could take all the searches for a given day, then find a 50%+1 subset that all have the same top result. There is no such top result.