That isn’t a “modern browser”. Windows 7 isn’t a modern operating system.
Griping about this is like griping that your old tube TV doesn’t handle digital TV.
They’re reducing tech debt, most likely. By moving to up to date development tools and developing for modern operating systems and browsers, and most importantly limiting backward compatibility, they’re reducing the amount of effort and support they have to deal with, and all the bullshit involved with maintaining that backward compatibility.
And it makes sense. Only a few recalcitrant luddites are still using Win 7 or anything like that.
Apple is from what I understand, kind of notorious for this sort of thing, and in their case, I’m sure it’s a sort of serendipitous thing akin to planned obsolescence. They stay up to date, they don’t have to support all sorts of old crap, and they push their user base to buy new phones.
Microsoft isn’t so diligent, but they do it too.
The fact of the matter is that in the modern world, you can’t expect a 10+ year old computer to continue to function and be supported. Seven years is about the limit of that expectation- that’s when in my experience, stuff starts to stop being compatible, and so forth.
I’m guessing you’d have shaken your buggy whip at the new-fangled motorcars as they zoomed by on the road, spooking your horses… in 1930.