exactly ignoring new technologies can be a death sentence for a company even one as large as Microsoft. even if this technology doesn't pay off its still a good idea to at least look into potential uses.
Only in very specific circumstances where there are clear moats to be built (mobile was one of these that Microsoft missed, but that's a PLATFORM in a way no AI product at the moment comes close to). As far as I can tell, there is no evidence of such a thing with the current applications of AI and I am unconvinced that there ever will be. It's just going to ride on top of previous platforms. So you may need some sort of service for customers that are interested, but having the absolute best AI story just isn't something customers are going to care about at the end of the day if it means they would have to say migrate clouds.
At the moment, I'd arguing doing much more than what say Apple is doing would be what is potentially catastrophic. Not doing anything would be minimally risky, and doing just a little bit would be the no risk play. I think Microsoft is making this mistake in a big way and will continue to lose market share over it and burn cash, albeit slowly since they are already giants. The point is, it's a giant that has momentum going in the opposite direction than what they want, and they are incapable of fixing the things causing it to go in that direction because their leadership has become delusional.