Technical writer here. I avoid saying something is "simple," because whether it's simple is subjective and is relative to the reader's background knowledge. So at best it's unhelpful, and at worst it can be insulting.
If you're stuck on a task, the last thing you want to hear is that it's really simple.
On the other hand, I would write that X is a simpler approach than Y, if I was comparing two possible approaches.
If you're stuck on a task, the last thing you want to hear is that it's really simple.
On the other hand, I would write that X is a simpler approach than Y, if I was comparing two possible approaches.