The general assemption is that if you use WordPress default theme, or pick a low footprint page builder, the page’s performance will be epic.
That doesn’t account for all the extra plugins added to the website, how complex and interactive pages are, as well as other elements hindering performance.
WordPress Core
- CWV passing rateMobile: 38%Desktop: 41%
- CWV passing rateMobile: 35%Desktop: 38%
- CWV passing rateMobile: 23%Desktop: 24%
Themes
- CWV passing rateMobile: 49%Desktop: 53%
- CWV passing rateMobile: 35%Desktop: 39%
- CWV passing rateMobile: 23%Desktop: 28%
- CWV passing rateMobile: 26%Desktop: 22%
- CWV passing rateMobile: nodataDesktop: nodata
- CWV passing rateMobile: nodataDesktop: nodata
Plugins
- CWV passing rateMobile: 44%Desktop: 49%
- CWV passing rateMobile: 25%Desktop: 28%
- CWV passing rateMobile: 21%Desktop: 23%
- CWV passing rateMobile: 17%Desktop: 22%
- CWV passing rateMobile: nodataDesktop: nodata
- CWV passing rateMobile: 26%Desktop: 30%
Page builders
- CWV passing rateMobile: 49%Desktop: 53%
- CWV passing rateMobile: 23%Desktop: 28%
- CWV passing rateMobile: 26%Desktop: 22%
- CWV passing rateMobile: 21%Desktop: 23%
Gutenberg blocks
- CWV passing rateMobile: 44%Desktop: 49%
- CWV passing rateMobile: nodataDesktop: nodata
Elementor Add-ons
- CWV passing rateMobile: 17%Desktop: 22%
- CWV passing rateMobile: 26%Desktop: 30%
You did the right choice by picking the most performant assets. But you still need to follow up with an effort to keep their performance stable.