I don't think FB was an outlier. I can't be sure, but I don't think there were many (any?) companies that took more than 10 years to profitability pre-2015.
I think Twitter took 11 years, and it was 2017.
Uber is actually a good counterexample for more reasons than just how long it took to reach profitability. It also raised a lot of money $13B+ (compared to Facebook's ~$2B and Twitter's ~$3.5B), and ~$8B from IPO (that's another interesting fact; IPO when bleeding money).
However, it would rather make Uber an outlier, not vice versa. I guess Tesla and SpaceX fall into the "Uber" bucket, too (SpaceX would actually be profitable pre-2015, right?). How many others can you list?
So yes, we have extending timelines, but pouring money into a leaky bucket for 10 years is still predominantly a losing bet. For each that eventually made it you would have Foursquare, We Work, Better Place, Jawbone, Theranos (!), Fisker Automotive, etc.
And for each of those, you would have dozens that are even more forgotten because investors pulled the plug after just a few years (anyone remember fab.com perchance?). I would put Groupons of this world in the same bucket.
But even if we treated Uber and Tesla as the norm, OpenAI has already beaten them all in terms of how much funding it raised (and Anthropic is on its way there, too). Both with no signs of profitability round the corner and an absurd burn rate that can't be carried by any single customer group (and I already think about their geography as global).
That's why corporate results are so important, as they can afford to pay a premium. ChatGPT users will not.
So even among the wildest outliers, AI companies are extreme outliers.