I did wash my baby’s cloth nappies (after soaking them in Napisan overnight) and clothing separately until she grew out of nappies.

I only wash my husband’s clothing separately because he has extremely oily skin so his clothes need extra soap or an extra wash to clean them properly.

I never separated the baby clothes from adult clothes. I just scrubbed and pre soaked all soiled items before washing them (and still do actually)

I did upto about a yr. I normally use sensitive detergents for all of our washing but I was more concerned about the germs on our skin compared to babies.
I figured in the first yr of life bubs will get sick, crawl and get covered in dirt from time to time so they have gained some sort of immunity.

Yep. Babies clothes go through their own separate wash. I use the detergent for sensitive skin and a little fabric softener. I guess around age 2-3 I started washing their clothes with ours

I separate in colours and scrub and soak any soiled items before I add them to the washing machine.