It still feels like this sometimes. Finding poorly documented system calls, changing screen properties in ways beyond BASIC, getting into how CP/M works internally... (more comprehensible than today's 1000x larger systems)... Or even doing Advent of Code in BASIC is cool!
I tried to convey some of that magic, or at least logically reason why those 8-bits were awesome, in a blog post once - https://retrofun.pl/2021/05/18/hobbyarding/ :)
It still feels like this sometimes. Finding poorly documented system calls, changing screen properties in ways beyond BASIC, getting into how CP/M works internally... (more comprehensible than today's 1000x larger systems)... Or even doing Advent of Code in BASIC is cool!