Those scripts were different per distribution. Sometimes shared, but then had to be copied basically manually from one distribution to the other. With systemd i

Those scripts were different per distribution. Sometimes shared, but then had to be copied basically manually from one distribution to the other. With systemd it's just a configuration file shipped by upstream. Any fixes automatically get reused by all distributions. The init scripts differed way too much across distributions. This including pointless differences in where various files are located. All of that has become way more standard, thankfully. I did have various issues with a few init scripts of my distribution. It didn't happen often, but nowadays you usually can do with a config file, way easier.