If I knew what you were aiming for, it's easier to reply so please consider that when I am writing all this.
When 9/11 happened I was coding in Pearl. PHP was brand new.
I'd say some dinosaur languages like Cobol, fortran, Lisp, etc ... should be avoided. It's possible but I just would because you won't find a person to follow up.
Today most languages that are updated at a steady pace would be considered equal as to not have to worry if I'd use it or not.
Young folks tend to be more cutting edge and will follow have baked platforms/frameworks.
Javascript seems to come out with a new cool thing every other day.
Currently, React (javascript) is super popular and everyone uses it.
Is there 1 language to rule them all? Today? nope. Developers are sort of retarded. They will create a new thing because they have a cool idea but and refuse to put that 1 cool thing with another 1 cool thing from another another developer to equal 2. They think they will build that other cool thing because they can but in reality never get to it. Like the trash. Except they don't have a wife to remind them.
The most problematic is when a langauge version or framework version is out of date. There was a claim here that CDK was outdated. This is malpractice and malicious intent. The version updates normally cover security fixes. If CDK didn't stay on top of their software versions it really is like leaving your front door open and hoping your closed door is security.
WordPress is not a framework. it's a "platform". You must update it almost daily. One of my servers is getting hammered and every request is regarding, surprise! Wordpress. ""GET /wp-admin/user/xmrlpc.php?p= HTTP/1.1""
So, pros and cons?
It's more like hipster versus gen x.
hipsters flood the market and want to use possible frameworks that are like a shooting start. You don't know how long they will be around.
GenX style of languages are proven but not many young people gravitate toward them so hiring will be a more senior person.
TLDR;
use something that gets steady updates and you should be good in most cases.
