Using fibers with PHP <8.4? [closed]

I am looking into PHP fibers. I read that to use fibers it’s a good idea to have PHP 8.4 but my servers will only support partially 8.1 and partially 8.3 for some time ahead.

Question: Are the changes to fibers in 8.4 so significant that you would advise against using them when not having access to PHP 8.4?