Ask HN: What are the common pitfalls/problems of Single Page App's?

I am working on a Single Page Application (SPA) using Angular 1.5 and while I have spent a lot of time building it, I keep reading about various "issues" regarding javascript frameworks in general. To be specific, I am building the server side API as well as the front end, so I have a lot of freedom to adjust both sides as much as needed (which can be good and bad). I feel like a SPA style app works well with the use case of the site I have been building in that we are making it easier for our customers to find their information in the shortest amount of time possible (think Google for product support). With that said, I have a bias towards this design choice because I built it. I know that I might be missing something and I want to consider more use cases than what I can come up with. What I want to know is when does it make sense to use a more traditional server-client architecture? I had read about Twitter reverting back from a SPA to server rendering, but I feel like thei