It’s one thing if different tools from different divisions of the same company don’t talk seamlessly together. Generally considered poor form. While that used to be common, EDA folks have cleaned that up a lot over the years.
It’s generally better accepted when tools from one company don’t necessarily integrate well with tools from another company. If there are good strategic reasons, it will happen. If not, then, as a designer or EDA manager, you’re on your own for patching the tools together.