Google, has all three. The real question is can they not shoot themselves in the foot while doing it.
Also SEO will always target the market leader.
As far as Bing's results: I keep thinking Google is trashy. Then I use Bing and I remember just how good Google is. That's my personal opinion. I am NOT going to claim they are SEO, and spam immune, far from. But they seem to do better than Bing in getting what I mean right.
ChatGPT may help MS, but is it a bandaid? Is it just a good PR bump? Who knows... Displacing Google is a large task.. and not one I'm sure I want MS to win. But I look forward to them trying, if only to make Google do better.
MS has them all three too.
And since, as you say, the algorithm part is not the most difficult part, others may enter the playing field soon (we already have DDG and Kagi, for example, with Kagi now experimenting with LLMs too).