Mathematica is open on my computer as we speak (or, rather, now Wolfram.app). The "About" screen indicates "Wolfram 14.2". I have a seat on an site licence.
Mathematica (MMA) and the Wolfram Language (WL) used to be the one and the same. But now a user could be using WL in a web based notebook, through Wolfram Alpha, or even on SystemModeler.
The brand name “Mathematica” isn’t going anywhere, not after nearly forty years. It’s basically marketing being like “how do we communicate updates to WL as not just being updates to MMA?”.
> The brand name “Mathematica” isn’t going anywhere
But it’s not what it used to be. Now you don’t “run” Mathematica - you “access” it running another program. It’s basically marketing to weaken one brand and strengthen the other.
https://imgur.com/a/WUpSsF8
(If you're interested in what I'm currently doing with it, I'm playing around with Mathematica's neural network library.)