While it's all about formalism, margins, profits... A few years ago, it was all about passion, creativity, and trying to do crazy things in video games.
Do you believe this to be true?
I don't believe... I know it's so lol.
1) What changed on how video game developers are?
Back then video games developed by people who have high skill to even create computures and thus pinball machines and therefore naturally they got used to writing programs even on assembly. They had fun with what they did therefore the result of some of their fun was developing video games. That's why Before 2000s it's not surprising to find technically very complex games that developer(s) really worked hard and created amazing works.
However especially around 2010 video game industry kinda "fully" shifted to people who is specifically educated on "how to work in video game companies".
Naturally after that point video game developers had "simple" education just to be able to use Unreal Engine and/or Unity, knowing C languages and whatnot higher-level of programming languages in a very "basic" way so they cannot even write "Hello World" on assembly. Industry tried to justify and find a way keep things simple and direct the job market by differanating these people as "video game developer" so naturally they actually lack necessary knowledge on how computer even works therefore the education they are not given result in buggy games that requires 5 years of "fix" because these guys know shit so as they work on a game they have to gain experience to cover up their ignorant education.
However I don't mean to say "old school computer engineering" is necessary for "decent video game development", it's just the way of how "low quality video game developer education" is. They are educated in a way they may develop simple physics based 2D games and have enough grounding for how to develop 3D engine and all but their brain crashes in blue screen of death when you had asked them to develop simple music edit program because their brain has the wrong POV of beliving "video games are a different program" than "other programs", so they don't see how huge aspect of programs share same shit. They don't get what is "different" is just how you use your programming understanding lol.
2) What changed in video game development?
You may see some AAA video game companies throwing excuse of "but video game development got so complex and hard" to justify the budget and why they use AI and all. However no matter the stage of era on video game development it was always complex and hard, what changed is development time and how much data has to be merged so they all can work in great harmony. As technical quality increases development time increases because higher quality of models and textures to more detailed game world calls for many optimization and play testing need.
3) What changed in video game industry?
Naturally industry started by gamers therefore continued by video gamers came together and founded companies to develop games. However especially around 2010 industry shifted into a public acceptance that how this industry is a good way to make money. That's why at that point video game companies became more strictly ordinary companies with "serious" structure and all and that's when even random rich guy who really has no idea what is a video game joined the shareholder wagon. Naturally goal to "play good video games" turned into "just selling something that we made society believe it's a video game".
So naturally company for example notices Netflix is very popular and it make them develop "game" that's more like Netflix stuff. They don't care about gaming and gamers, they will turn "video game" industry into just an interractable digital story program and that will be all about it.
4) What is the future of video game industry?
Countries will start their own video game industry. Whole industry will be divided into AAA and indie that will mean to play Netflix-like rubbish programs you'll buy from AAA video game companies but if you really wanna play a video game you'll buy from indie developers. It'll get hard for companies to produce a real video game and make money because most people are not a gamer, and that's why companies targets non-gamers to sell "games". Perhaps eventually the industry will be divided fully into "interractive movie programs" and then "real deal video games" lolol.