Definitely worth the time, the 6502 is a cool chip and it was literally everywhere.
It might make more sense to link to the proper website that they’ve set up for it rather than an Adafruit blog:
The official website has a lot more information.
The story in the About page is particularly interesting:
Personally speaking the closest I’ve ever been to an actual 6502 (as far as I can remember) is the various attempts I’ve had at making 6502 emulator.
(I usually end up getting distracted. Emulators are pretty tedious things to create.)
I loved 6502/6510 Assy coding in Vic-20/C64