Duke Dixon
Superstar
That bold really nails down what made Suspiria so memorable for me. The entire movie is like a trip into the uncanny valley or an extended dream (actually, there's a similar vibe in the dream sequence in Exorcist 3 IMO). The visuals, the way people behave, even the cuts and transitions have a "something's not quite right" element to them. It's my favorite giallo film (though that's not my favorite genre admittedly).
Ironically, the comparison with the newer version just made me thing that I owe that new one a second watch. I remember the movie for it's most visceral moments with the witches and of course "that" dance sequence (you know the one). But I hadn't been pressed to go back and rewatch because I thought it dragged in some sections...and now that you mention it, I think that's where the "filling in things that didn't need to be filled in" element comes in.
I'm definitely gonna go back and watch that new version again.
Speaking of Giallo, it's far from his best work but Dario Argento directed his first new movie in something like a decade last year. It's called Dark Glasses and I think it's on Shudder. I thought it was alright, but very mid (well below the standard of his classics). But it's short enough and solid enough that it makes a fun watch as a modern effort from an ATG horror auteur.
Added it to the list.