On Twitter, Google’s John Mueller said that it’s advisable to keep your web pages simple. Google’s web crawler cannot fully crawl and index all of the latest technologies. Even JavaScript pages cannot be crawled fully.
If you care about high rankings on Google (and other search engines), focus on the current status quo of web crawlers:
I'd recommend making it work with the status quo, rather than waiting for bigger changes, if you care for search.
— 🍌 John 🍌 (@JohnMu) 26. Dezember 2018
The Top 10 Optimizer tool in SEOprofiler helps you to optimize your web pages for Google’s current ranking algorithm. It compares your web page with pages that currently have high rankings on Google and it shows you the things that you have to change: