[denzil]

Having had worked with both Pytest and Robot, I have to agree. And to expand on that, Robot framework had multiple disadvantages for us. (Note that this is about 2-3 years, so maybe things improved).

It was pretty slow, just rewriting the same test using Pytest sped it up by about 50% on average and that was despite our test environment being the slow part.

The Robot language was quite error prone as it uses spaces inside single keyword as well as to separate parameters. And the IDE support (VSCode in our case) wasn't particularly great. We ended up having to write custom static analysis tools, to catch some of the more common Robot problems.

And pretty much every time something more complicated was required, it was easier to switch to Python to do it. So in the end two languages were required instead of one, making maintenance more painful.

That is not to say that Robot doesn't have its good points. For example retrying on error was much easier than in pure Python. But in the end it was much more work than just using pure Python with Pytest as testing framework.