The danger of novelty is that you get stuck in a tarpit of unknown unknowns.

Here's how the scenario often plays out.

You run into a previously unknown unknown that blocks your path.

The way to address the problem is a month of effort to fix it.

You invest the time, all the while with the pressure mounting as your overall progress is slowed.

If you get unlucky, it turns out the work doesn't fix it, but uncovers yet another previously unknown unknown.

Now you have even more sunk cost down this path, and also more urgency (you're already behind), so you sprint into the next unknown unknown even faster.

The faster you sprint, the more you thrash, the more you get stuck in it.

At each point, you're faced with two bad choices: wade deeper into the tarpit, or try a totally different approach that might be just as bad, now with significant time pressure.

This is the danger of novelty.