I'm pretty sure you could do this 20 years ago, there just hadn't been that wave of marketing around microcontrollers as a hobby that happened around the time of Make magazine. $2 for a PIC and $45 for a programmer, maybe? Waiting excitedly for the next issue of Nuts & Volts? Idly flipping through the Jameco and Small Parts catalogs? Toolboxes filled with TTL?
The internet is certainly an advantage, but it also ain't too new.
edit: randomly posting the Small Parts catalog so we can reflect on and celebrate what was lost https://web.archive.org/web/20160323004150/http://www.smallp...
NO MINIMUM ORDER
Also, a shout out to American Science & Surplus, off to the suburbs after 84 years.
https://blockclubchicago.org/2021/10/13/american-science-sur...