Come on...
Windows 7 was launched in 2009. That's 13 years ago, nearly 14.
Each of us are all just one bad decision away from living in the gutter next week, so heck I'm not being judgemental, but just how long are mfrs expected to make their software compatible with obsolete OS's?
As a dev (no, I'm not an Arturia dev), sometimes obsoleting old hardware and OS's is a matter of wanting to streamline your code to make it more efficient for the majority of users running newer OS's and newer hardware. Sometimes it's just a hard decision you have to make otherwise you can't ever improve because of having to drag-along users running your software on some steam-powered antique in a cave.
I don't really have an answer if your circumstances dictate that you can't currently upgrade, and like I said but I'll say again to stress the point: absolutely no judgement from me. But you can't blame Arturia for it.