Welp, there goes Kortlandt into the wild speculation stage of retirement: he has now posted an essay according to which Indo-European would be a branch of Uralic — more specifically that Indo-Uralic is a sister branch of Finno-Ugric, and Samoyedic is a more distant relative. This is based just on archeological considerations, while linguistically this is obvious nonsense if you know anything about the structure of Samoyedic (on the level of claiming that Latin is actually Germanic and is more closely related to modern Germanic languages than Gothic is).
The list of Indo-Uralic grammatical formants is still interesting, but it also certainly hides a lot of detail under listing things like three “locatives” (nominal? postpositional? etc.), two “nominalizers” (action noun? actor noun? etc.) and four “participles” (active? passive? etc.)