Digital Press’s review published on Letterboxd:
The official movie of the phrase “life’s a beach and then you die”.
Seriously, this is a beautiful horror movie and if you care about any of the characters you’ll be on the edge of your seat from start to finish. It’s not without its problems, but if you can keep that willing suspension of disbelief alive it’s worth your time. Because if horror is truly your thing, one of the few true horrors that is rarely addressed in cinema is the fear of dying simply by growing old, whether by natural causes or from life’s ailments breaking the body down.
That’s what Old does best, playing out the way injuries and ailments, physical and mental, nagging or chronic would progress if they were sped up and without treatment. If you want horror, watch a bone deficiency or a cancerous tumor or an infection go unchecked and in fast forward. I’ve never seen anything like it and I’m quite sure I’ll never forget it either.
Like most M Night films, there are lots of unanswered questions and plot holes, even when the conclusion is satisfactorily explained. I’ve come to learn it’s best not to dig in too deep with his characters or “science”, but rather take it all in like an amusement park ride. Enjoy the sights and sounds! Old is a wicked trip.