Let’s not forget our beloved Flash, who knows how Macromedia would have handled it and maybe it wouldn’t have had to be removed from browsers under Adobe’s watch due to security issues.
I almost never see anyone mention Macromedia in relation to Flash these days, almost as if history has rewritten it to an Adobe thing.
Flash always was a dumpsterfire, and so were virtually all browser plugins using native code. There's a reason NPAPI was deprecated eventually.
The exception of course is ActiveX. There was no way to ever make that shitshow even reasonably safe, simply given how its execution model was.
From a developer perspective, I'm still sad that it went away. The old COM/OLE/ActiveX ecosystem was flexible to a degree nothing has never ever been since.
I think it matters. Look what happened when Adobe acquired Macromedia in 2005. The innovative product (Fireworks) that brought many (but not all) many of the innovations that would later come in Sketch and then Figma was left to slowly die because it competed with their flagship product (Photoshop). That delayed innovation in that market segment by around a decade.