Would you make the same statement to a referee who has used the same setting with several different systems and groups of players, all pursuing more or less the same kinds of adventures for similar reasons?
Two of those systems are my own take on OD&D, the Majestic Fantasy RPG, and the 2014 edition of D&D 5e. This referee not only used the same setting with both, but ran the exact same adventure with different groups, swapping in the 5e stat blocks for creatures and monsters and statting out characters using the same class and level in each system.
Being that referee, my observation from doing this is that D&D 5e feels considerably more fantasy-superheroic than my OD&D-based system. This isn't based on a single campaign from years ago. I have observed this many times since the release of D&D 5e in 2014, including sessions and campaigns run as recently as the past two weeks.
Now, I have some techniques for keeping D&D 5e more grounded. But it has been my direct experience that, with the common ways people choose to use D&D 5e for campaigns, particularly with multiclassing and feats in the mix, the superheroic feel compared to the classic editions becomes highly pronounced.
I have several actual play reports on my blog post if you need verification. Particularly for GURPS, Fantasy AGE, D&D 5e, and my Majestic Fantasy RPG.
A blog on 40 years of gaming and Sandbox Fantasy.
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