https://www.protovision.games/
http://www.psytronik.net/
https://doublesidedgames.com/
I'm wondering what is the motivation of the authors of such games? I think that it cannot be financial because most probably the market is pretty small. Is this just a hobby or something else? Why don't they simply make games for modern platforms?
I also prefer old style game development as opposed to using frameworks like Unity or Unreal engine. It's a different feeling when you have complete control of the entire machine and everything you need is in one or two reference manuals. It's a more focussed and immersive experience. You can really get in the zone. Also, It's a lot easier to do acceptable artwork, especially for an 8bit machine, and with modern tools you can do things that couldn't be done back in the day.
Also, I've been involved in indie development for modern platforms and made about as much money as I would have releasing an Amiga game in 2021 :) So now, I figure I will just please myself and work on platforms I enjoy.
It's a do-over in some ways.
Also, modern platforms require a lot of overhead and toolkits and it can all get too much. Some of the older platforms are a lot simpler in many ways. (They're still plenty complex in other ways as well - don't underestimate the coding golf challenge angle either)
On top of all that as well is the ability to use brand new tools to build software for old platforms. Graphics/sound/code editors are now vastly improved.
also modern hardware is more than capable of running emulation applications, allowing people to play an old school game, and not have the problem of centralization, or always online requirements getting in the way of actually playing a game