And I am sorry. Things definitely used to be better than they are now, in some ways, and definitely used to be worse, in other ways (for example, it used to be a very white, very male demographic). It's not my fault that things went the way they did. Folks liked money, so folks built a culture that maximized profit, and eschewed humanity.
I am quite sorry about that, but it doesn't change the fact that it was not always so.
It's not in my personal interest to go about creating a slideshow on "how things used to be." I know what I know. I lived it. I ran teams, exactly like I described, and I was a proud member of very large, high-functioning teams that stuck together for decades without stabbing each other in the back.
Let's just agree to disagree, then, eh?
I don't disbelieve you, but I'm saying your experience can't be generalized in that way. Only aggregate data can tell us these things. Your experience may well have followed the exact trajectory you've described, but maybe 90% of people see the opposite.
Everyone is at best a temporary ally, friends and community groups are just atrophying daily as we continue to not invest in people and community and invest in more alienation.
Team is still very much a thing and if your team members are looking at each other as competition then that sounds like a culture thing, maybe the norm, still not acceptable.
This mindset will damage you over the long run, and the resulting career success may or may not be able to offset it. A zero sum mindset will lock you into this view along with the accompanying anxiety.
That's absolutely heartbreaking.
In the old days, we would have a team, that would compete, as a team, against other corporations. Our team would stick together, work together, and, quite often, function as a unit; leveraging each others' strengths, and compensating for each others' weaknesses.
Nowadays, we look at our team members as "the competition." In fact, we may actually be making plans to move to the other team.
But I have written programs in C, that were still in use, 25 years later. I have written programs in PHP, that were still (are still) in use, 15 years later.
There'll always be room for the classics.
That said, I'm quite looking forward to seeing what I can do with the new AI stuff.