Bonus: good tests can also serve as technical documentation.

Though I have to disagree with the notion that documentation is as important or more so than code.
Documentation is certainly near the top of the list and often undervalued. I’ve worked on a project where documentation was lacking and it was painful to say the least.
Without documentation, changing or adding features can be a nightmare. Investigating bugs and offering support is also very difficult. But without code, you have nothing. No product, no users, no value.

There are (inferior) substitutes for documentation: specialized team knowledge, general technical expertise. These alternative pools of knowledge can be leveraged to create and improve documentation incrementally.
There’s no replacement for the actual functionality of your applications.

This works as a general guideline, but sometimes you aren’t able to write the code in a way that truly self-documents.
If you come back to a function after a month and need half an hour to understand it, you should probably add some comments explaining what was done and why it was done that way (in addition to considering if you should perhaps rewrite it entirely).
If your code is going to be used by third parties, you almost always need more documentation than the raw code.

Yes documentation can become obsolete. So constrain its use to cases where it actually adds clarity and commit to keeping it up to date with the evolving code.

Extra steps that guarantee you don’t accidentally treat an integer as if it were a string or an array and get a runtime exception.
With generics, the compiler can prove that the thing you’re passing to that function is actually something the function can use.

Really what you’re doing if you’re honest, is doing the compiler’s work: hmm inside this function I access this field on this parameter. Can I pass an argument of such and such type here? Lemme check if it has that field. Forgot to check? Or were mistaken? Runtime error! If you’re lucky, you caught it before production.

Not to mention that types communicate intent. It’s no fun trying to figure out how to use a library that has bad/missing documentation. But it’s a hell of a lot easier if you don’t need to guess what type of arguments its functions can handle.

The point is that you’re not fixing the problem, you’re just masking it (and one could even argue enabling it).

The same way adding another 4 lane highway doesn’t fix traffic long term (increasing highway throughput leads to more people leads to more cars leads to congestion all over again) simply adding more RAM is only a temporary solution.

Developers use the excuse of people having access to more RAM as justification to produce more and more bloated software. In 5 years you’ll likely struggle even with 32GiB, because everything uses more.
That’s not sustainable, and it’s not necessary.

Many of the programming languages that are regularly the butt of everyone’s jokes don’t just allow you to use them badly, they make it easy to do so, sometimes easier than using them well.
This is not a good thing. A good language should

• be well suited to the task at hand
• be easy to use correctly
• be hard to use incorrectly

The reality is that the average software developer barely knows best practices, much less how to apply them effectively.
This fact, combined with languages that make it easy to shoot yourself in the foot leads to lots of bad code in the wild.