Yeah there are definitely still limitations. Not sure how much it has evolved since the update on the article as we just got started with it couple of months ago. It has been so far sufficient for our needs, but yeah data loader sounds like a lot more trickier problem, I'v yet to try to solve that.
Of course, every serverless service has its limitations, but if used wisely it can cover most of modern apps scenarios IMO, and then if your case is complex and needs fine-tuning, then maybe serverless is not for you and you should use something else :)
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.