Here’s the deal: you learn web dev for a while, create projects( do the best you can), learn new things, then eventually looking at your old code hurts so much, you start seeing tons of small ( or even big!) irritating wrongs on each level.
At the same time you still must study constantly, learn new more complex things, create new projects and you still have only 24 hrs/day, and suppose you can’t find your name on ‘the best programmer in the world’ list.
And the question is what do you do about it? Is updating old training projects worth it? ( they are a part of your portfolio…)
ps Of course if there’s something that is used by other people the answer is “Just do it!”
upd: with ‘the best programmer in the world’ I was referring more to speed and effort, e.g. if you could fix everything within a minute with your left heel, it could make it a bit lesser of an issue