[fernly]

Indeed, it is highly useful for learning projects. See Ben Eater's "Building a 6502 Computer" series[1], and Quinn Dunki's "Veronica"[2], each a from-the-ground-up creation of a system around the 6502.

[1] https://eater.net/6502

[2] https://blondihacks.com/veronica-all-articles/