@evan gracious of you and Misskey developers, thank you. (Use of word gracious because I thought your https://cosocial.ca/@evan/116503475632266219 was crying for a version involving more wordplay but I couldn't come up with anything I was fully satisified with; this is a remainder.)
Sparking writing down idle question: what's the nearest to wpt.fyi and caniuse.com for AP? Naively searched and found https://socialweb.coop/activitypub-testing/ https://feditest.org/ and...
Ah, guess https://socialhub.activitypub.rocks/c/activitypub/testing/77 is where I should read more