But I'll bet all but the lowest-level melee characters always had magic weapons and armor. And that's still -- by almost any non-D&D inspired baseline -- fairly common magic items.I disagree on pretty much every count.
First off, it may be your experience that the "classic D&D feel" is for fairly common magic items. But what that means is pretty much defined by your DM and your early experiences gaming in it. My classic D&D experiences never involved my characters becoming walking trinket repositories.
And I don't know how you can disagree that if +N weapons and defensive items exist, the math of the system has to take them into account, unless you just don't care if the game is balanced or not.