And just how many systems are running today which are still compatible with the IBM System/360?
Good question, on the upside nobody will be able to bully System/360 admins to run Systemd.
For "Easy access to the market" I'd say it was the 8-bit era, since all you had to have was an 8-bit computer, record your software on a tape and go to any tape printing facility with your "master".
For money I'd say it was the early iOS era, since Apple made nearly as easy and open as the 8-bit era to access iOS, and the market was not as fully crammed of competition as it has become later.
The 90's were already too difficult, hardware was a rapidly moving target (if you came from Amiga or the Atari ST in the 90's you had to start writing to DOS since both 68k machines never had a sequel with the right success, and then you would have ended up to reshape your abilities to write first for Windows and some weird graphical API, then ending up to write for Windows with either Direct X or OpenGL).
Crowdfunding is letting small creators getting easier access to better artists, musicians, but the market is still the same, and creating assets hasn't became easier than with the mobile resolution.
Physics lovers and automotive geeks answer me: if the car cpu thinks to be in presence of an unavoidable and possibly lethal crash to engage can't it just engage an additional system that adds braking power?
Like an emergency system of additional feets, something like a jet landing gear, ending not in a pair of tires but in a brake. I don't know if that could have side effects requiring the parts to be substituted or putting some odd straining to engine or transmission, but that's still better than swerving into another car.
Bell Labs Unix -- Reach out and grep someone.