Automobile accident avoidance

A little story. I was driving on a highway when the battery lamp started
flickering. I managed to get all 10 kilometres to home but the systems started
to fail on the way. The engine lost power and could not rev fast. The last
thing that failed was the electric power steering and the car was hard to steer
the last km. After this event the battery voltage was under 11 volt. After
changing the alternator the following things materialized. The power steering
that had been a little unstable at high speeds was now rock steady, The
aircondition that had been loosing effect was back in full vigor. And the
engine that had been I little rough in idle was now humming nicely in idle.
The lesson is, that if a car suffers of the above minor issues, then the
alternator is properly due for retirement.
learn more from here：https://www.apogeeweb.net/electron/bad-alternator-
vs-bad-battery-vs-bad-starter.html
If you have any good ideas, share with me.