PHP Upgrade


What is the consensus on upgrading to PHP 7.3? Is this something best left to Support? I read the WHM "How To" and it looks a bit intimidating. At this junction, how likely is it to have an adverse effect on current websites? Thanks in advance for your input, advice, suggestions and recommendations.
It's pretty straight forward through WHM. Just a matter of checking the boxes for it really.

If left to support it's a 5-10 minute ticket so if in doubt, feel free to open a ticket.
Wayne - if you'd stop drankin' so much of that korn likker you buy up in Casar, you wouldn't have any trouble a'knowin' whut to do.....