No idea, the docs do not say (the docs on PRs need improvement in general) but they do say that it is not required for Dashboard so not sure what do it. I’ll try PNG. The irony is getting a PR to pass all the ‘tiny’ tests is harder than coding the card itself.
Yea, the docs don’t go into too much detail about it. I don’t think it’s a requirement per se, except for logos/icons. But the developer docs show use of .png in their example and I’ve encountered several repo’s where it’s for project convention. Could be a moot issue, though.
maybe not depreciated technically but looks like they are changing the terminology, or not being consistent, which can make things confusing vs using a single same word; not 2 different words to mean the same thing – depending on the location. no biggie