@julian Manu, maker of JSON-LD who also helped with the AP Confs, made this nice video https://www.youtube.com/watch?v=vioCbTo3C-4 JSON-LD is a normative reference to ActivityPub. The context of AP is only 1 line, maybe 4 if you support the official extensions. It does not make anything much larger. It is for example important if you want to consume the federated wikipedia, wikidata, European Broadcasting Union or these Public Broadcasters https://www.publicmediaalliance.org/public-broadcasters-create-public-spaces-incubator/ but also to know that e.g. mobilizon uses schema.org for addresses. I give you an example, if you include "mz": "https://joinmobilizon.org/ns#", "wd": "https://www.wikidata.org/wiki/Special:EntityData/", "wdt": "https://www.wikidata.org/prop/direct/" in your context, then you know about mobilizon extension but also the whole common knowledge of the world … I like that, now you can support the whole vocabulary of wikipedia and wikidata which is just JSON-LD. You get it in all the languages of the world including the properties name. No problem, if others don't support it, but sad for users. @hongminhee