It used to be in ASB world horses typically didn’t get turnout from late Feb through end of Nov, or if they do it’s in small individual paddocks. Then from end of Nov-Feb most are kicked outside with shoes pulled in turnout. Some are out 24/7 and some are just out during the day depends on horse and trainer. Mine were out 24/7 in a group of show horses and other than a few bareback and trail rides virtually untouched except for vet/farrier work. They would come back inside in Feb with limited turnout and start long lining/driving. Show shoes first week of March and first show of the season 3 weeks later. Mine would get out of their stall 3-4 times a day which wasn’t super uncommon. Hand walk in AM, 20-45 min work, hand walk in PM, 20 min in the outdoor bull pen.
Babies get the stall space in the winter and are usually broke to ride and drive during that time.
My ASBs were sound and super happy horses well into their late 20’s. One of mine definitely preferred stall life, he wasn’t the fondest of turnout and preferred the hustle and bustle of barn activity.