Topic says it all 
I have some old legacy sites which still use C2 and PHP 7.3. But what about PHP 7.4 (if they upgrade the server)?
I was able to install PHP 7.4 to my devel server. It seems to work in general. I don’t know if there are any underlying issues but at least no errors or warnings…
No need to guess when we have CI which runs the test suite on PHP 7.4
Great, thanks ADmad!