Any car before electronic ignition became more popular. My first two cars (purchased already old) had them and I’m old but not ancient. If you had a mass production car built in the 1970s or earlier you probably had this in the distributor. The points eroded due to the high voltages and would get a pitted surface, causing problems with ignition timing and that could be bad. It’s a wear item, so file them to dress them up a bit until you can’t any more. Then replace them. But when you file or replace you’ve got to adjust the points and check the timing (edit:) dwell again.
Both electronic ignition and later the ECU (plus developments in materials science) improved the lifespan of spark plugs too. This is why there were so many tune-up shops in the old days. You needed to regularly check the plugs, points, timing, oil and filters. Plus all the other things that didn’t last or remain in adjustment as long back then as they do now.
I’m doing this on a couple of machines. Only running NFS, Plex (looking at a Jellyfin migration soon), Home Assistant, LibreNMS and some really small other stuff. Not using VMs or LXC due to low-end hardware (pi and older tiny pc). Not using containers due to lack of experience with it and a little discomfort with the central daemon model of Docker, running containers built by people I don’t know.
The migration path I’m working on for myself is changing to Podman quadlets for rootless, more isolation between containers, and the benefits of management and updates via Systemd. So far my testing for that migration has been slow due to other projects. I’ll probably get it rolling on Debian 13 soon.