Yeah, but if your boss or client sends you a document that doesn’t work you’re not going to tell them “Uh well this is a badly formed document and you shouldn’t embed scripts and it’s your fault that my FOSS alternative application can’t work with this”. At least I hope you’re not.
It’s especially rough when you remember seeing it on the internet before and even had it yourself at one point. There are/were a bunch of music artists I discovered at both the old eMusic and the music section of old download.com, but those collections weren’t archived anywhere in any meaningful way when the sites changed. It took me years to finally locate what I was after. It’s just so draining to know that something used to easily and freely available and to not be able to find it no matter how hard to dig.