Even as a professional software engineer, the value of being able to obtain and hack on "the rest of the software universe" would be far greater than the value I can obtain by being able to deny others that right on my relatively minor scope of work.
Copyright tends to enable one software business model above others: selling canned bits with no extra work. If you're not in that business, you have little to fear, and only free publicity to gain.
If we eliminated copyright tomorrow, you could torrent a copy of $work_monolith with no repercussions. There would probably be little demand, as it's in-house tooling for a niche industry that requires non-trivial infrastructure to use. I would still have a job, because I'm still among the best-qualified people to manage updates, bugfixes, and compliance needs. Hell, now I have multiple potential buyers for consultancy and development services!
I think you can also say that there is something inherently sad about squandered value. Nobody ends up better off in the current scenario.
Microsoft has little to no interest in selling Windows XP, but there is a cadre of users who are interested in it. I've seen a fair number of people who want to build "the dream gaming PC of their childhood" now that they have the disposable income to do so, or people with technical "we can't replace the extremely specific software/hardware that controls the $5 million industrial machine with anything newer" lock-in. They lose out on being able to legitimately build something they want, and it's not like Microsoft was going to convince these people to buy Windows 11 for that use case instead. There may be some Rube Goldberg chain of downgrade rights you can invoke, but I doubt it's as simple as "buy a Win11 key and enter it in the XP installer's prompt", nor is it the sort of thing that's widely communicated.
I always figured the compromise solution was a (likely state-mediated) mandatory licensing board. You want Windows XP and the vendor won't sell it? Buy a concession license at a negotiated price from the licensing authority instead, and your "acquired somehow" copy is now legally sanctioned. That would ensure permanent availability of "back-stock" content, and the concession funds could be funneled back to the original authors, providing an effortless trickle-source of revenue on otherwise unsaleable products.