Tested one again this holiday, our local enduro champion, William Oosthuizen's practice bike, so stock standard. He ended up 14th in gold roof in 2017, so it can obviously do tech and do it well. It is so light and nimble. It loves to go fast and it loves to corner. I was amazed at how quickly it picks up revs and how responsive it was. And yet it could also lug low down when paddling.
But that being said, you have to be an exceptional rider to make this bike work for you when doing heavy tech. It can do it, but there are better bikes for that. For anything else the 250X is still an amazing bike despite its age.