I completely agree, but don’t think it’s something to worry about at all.
In the divinity games it wasn’t even increasing magical properties that made your previous gear obsolete, but the base damage or armour ratings. You could find a unique named weapon with bonuses and maybe even a free skill that really complemented your build, and it would still be completely outclassed by some magister scrub’s standard issue sword a few levels later.
But item leveling just isn’t a thing in D&D, and I hear in 5e they deliberately balanced the game so that magic weapons and armour aren’t necessary to keep up.
That said, getting cool loot is a big part of RPG video games, probably now more than ever before. So I expect there will be plenty of magical weapons, armour and items to find. They could still offer all sorts of interesting bonuses, but without the basic damage scaling. So if you find something you particularly like, I guess you could just stick with it.
