Retro New? OS/Languages? (opens in new tab)

For the most-part this esteemed forum talks about real computing systems with many histories, cast studies and so on, but has occasionally mentioned new system designed based on (or even using) retro ideas and parts. some years ago (2018 if you want to know) I started on my own retro-new systems - thinking about a fantasy parallel universe where I wondered what I could do with old systems with todays knowledge - I chose the 6502 because that was the first CPU I ever programmed assembly langua...