The problem is it is very hard to make changes and build innovative new products within big tech, at a pace to compete with smaller companies. Big tech succeeds despite it since the resource disparity is too much.
Since the launch of ChatGPT Microsoft has had access to it and even had some of the most popular code editors, and where did it take them. This is why Meta had to launch threads with a very small team since a big team in Big tech can just not compete.
Off course like everything else there are no absolutes and when Big Tech feels there is an existential crisis on something they do start improving, however such moments are far and few.