PHP 7.4 vs PHP 7.3 What are the benefit ?

• It’s the latest version of PHP so it definitely more secure than PHP 7.3 and other older version.
• Major issues are fixes in the version 7.4
• Its performance is quite faster than 7.3 and other older version
• It will come up with major change for WordPress sites and performance will definitely increase.
• And more over 60% site are made up of PHP so support will be better.

What are the major features of PHP 7.4 version?

Support for typed properties
Support for arrow functions
Covariant Returns and Contravariant Parameters
Coalescence Assignment Operator Support (?? =)
Weak References Support
Preloading
Propagation operator in array expression
Deprecations