It's not and you can't rationally argue that, because "older" doesn't make something "more D&D". That's a completely irrational and sentimental position of the absolutely worst kind. That's not the good argument you think it is.
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What?! I mean genuinely what are you talking about? 34 years of D&D, like a dozen groups, I dunno how many people, and I don't I've ever seen a player go "Oh I love this magic item but I have to throw it away so I can use this higher number one, oh I'm so sad!", which seems to your contention here. And 5E does not solve that at all unless the player literally cannot do math or understand rules.
In 5E magic item with more pluses is worth MORE than they were in previous editions. In 3E and 4E, magic items were assumed into the rules. Whereas in 5E, they're not - and thus in 5E, they break bounded accuracy (inarguably), and thus more plus are more powerful, pound for pound as it were, in 5E. 5E some really insane high-damage items too, like the +2d6 on a flaming sword, which absolutely laughs at the bonus values on items in earlier editions (relative to the per-swing damage).