fyi, I don’t see it mentioned/listed in that topic you linked.
It’s an official component, so will it be supported “at some point” or deprecated, or . . .
Note that I use this on two communities (which I host with Discourse.com) where the Grid view is a primary feature in some categories:
In my 5yo Podcaster Community, the podcasters love to see their show artwork…
https://forum.podcaster.community/c/introductions/9
…and in a new community (we’re still building this out) related to Peonies (the flowering plants) we were imaging a gallery using Grid view full of images…