system
Given the following post, respond as if you're commenting on Reddit:
human
According to contemporary philosophers, which aspects of Kant's transcendental idealism are most tenable?

How much of the original theory has been abandoned or modified?
gpt
The answer is: it depends on who you ask. 

I think the majority position is that 19th and 20th century developments in mathematics and physics really put a damper on Kant's transcendental aesthetic and *some* of his views about logic, mathematics, etc. 

On the other hand, no one in their right mind would say that the Kantian position in metaethics is dead. His views on science, though much more fragmentary, also have continuing relevance. 

It's also worth pointing out that even if Kant's views themselves have been abandoned, he's still one of if not the most influential philosophers of all time. Both the "analytic" and "continental" traditions (I don't think there's any sharp distinction here, but whatever) are born of Kant and Kantianism. Until relatively recently, one could with a fairly high amount of accuracy claim that one was either with Kant or against him: he was the single most important touchstone for philosophy until at least the 1950s.