from a non-US perspective yes, but so are the rest of the major providers
The moat is way smaller than with Office or Gsuite because they feed data into the chat interface and it gives them an answer. The moat for Gsuite and Office is higher because you have to move all your data and reorganize it. Oh and everyone has to learn how to use the new software clients.
This time, it is different with AI. The rate of change is significant.
From no internet to internet the change is pretty profound. But my job is already very automated for the most part. It's true AI might automate it a bit more, but it's not like I'm going from zero automation to full on automation. That's not nothing, and it is worth something, but it's also not internet from no internet level of change either.
This is essentially what Google has done, and it's a shame the US is so weak on enforcing antitrust laws.