Less features? The only thing I can think of are the advanced topology surfaces that rhino has. I'd argue most people don't need or want those.
What I REALLY dislike about max is the subscription model. It encourages piracy in all but the wealthiest nations worldwide.
But the biggest downside of all is being windows only.
I like how nobody ever complains about software that's OSX only, but if something is windows only then HOLY SHIT CALL OUT THE FUCKING CAVALRY
Most people tolerate Windows. Many are waiting for the day they can get rid of it completely except for this annoying list of Windows-only applications they can't live without.
But maybe there are shortcut profiles for Blender to match 3DS Max?
I had the same attitude coming in from Softimage but eventually had to bite the bullet because I was screwing up a lot of Blender's workflows just because I remapped a few keys to match SI. But once I'd internalized the default ones (which took a dozen hours), I never looked back.
EDIT: YMMV and it could be different for Max - I haven't used it in a long time, so I can't compare.
But yeah, it is overpriced commercial software, so you are way better off using Blender in the long run.