I just read something which I'm questioning. It said "Always use soiless mixtures in pots because soil will compact with each watering." Is that what you folks do? I tend to mix up soil and whatever is handy for organic matter plus some water retaining crystals.
I like the old JI composts, and don't have any problems with them.
If it grows it is good.
I suppose that every one has a different definition of 'soil' but I call everything which makes up a growing medium soil.
May be I just interpret things differently to normal people
I would think PurpleHeather is right but I always think of soil as the soil I get from my allotment and that is heavy clay so I wouldn't use it in pots as it does compact down.