Safari's PDF viewer doesn't allow you to annotate, especially not in real time with other users: https://pspdfkit.com/instant/
It's also quite basic when it comes to forms and often loses data.
For cases where more performance is required we always recommend using PSPDFKit Server, so PDFs render in native code on a high-power machine, and very likely using cached tiles.
>Safari's PDF viewer doesn't allow you to annotate, especially not in real time with other users: https://pspdfkit.com/instant/*
I never asked for that though, so there's that.
I can see people wanting that, but then I'd have to wonder why they are using PDFs for that purpose and not something like Google Docs.
Think construction plans, PowerPoint presentations, contracts - there are many documents that don't fit the classical Word document model.
But why would one expect a browser to support that feature for PDFs?
You wouldn't, and it doesn't. But webapps and websites can usefully do it.
Also why would I want to download an entire pdf engine when i already have an AOT version? (Stealing that phrasing by the way :) )