High load isn't necessarily an emergency, but it may be a heads-up before a site noticeably slows down. Sometimes there are weird spikes that just go away, but sometimes this is an indication of a Denial of Service.
If you have a current Drupal site (built in Drupal 8 or later) you no longer need to entirely rebuild your site -- ever again. That doesn't mean it couldn't use a freshening up now and then.
Over the past few months, I've fielded a lot of minor styling requests, and as I work through each problem, I've almost always ended up with substantially less code than was there before.
I learn best when I have a problem to solve, and with one of our D8 upgrade projects, we had a mess to clean up in the menu system.
Kicking off some posts about various performance challenges we've fixed.
[Edit: Thomas point out this is not really factorial, because it's addition of each number in the sequence intead of multiplication].
What can you do about this page being so slow? That's a question we've been asked by half a dozen customers in the past 6 months, and as it turns out, we can do quite a lot.
We regularly import content from old web sites and systems.