thank you, I say the same thing every time I see this come up.

That's a young mans game, after you've been doing this stuff long enough the things you learn are in terms of systems design, maintenance, etc. I regularly go back to code I wrote 2 and 3 years ago and think to myself "knowing what I know now, that code is mostly alright".

I can't understand how someone can go back and look at some authentication code, for example, and think the way they did it was horrible. Just how many different ways can you write auth code?

It's one thing if you're a young developer, but at some point the improvements to your code are negligible and have nothing to do with the value you bring to a project.