I planted about 150, Texas Super Sweet seedlings in late summer last year just to see how they would perform in the fall. I had never tried growing them in the fall. Home Depot was selling them and I thought maybe they knew something I didn't know about growing onions. They performed well as green onions in the fall and winter. I always plant onions with the intent and desire for them to produce large bulbs, but also eat some as they are growing. They stopped growing after we had our first hard freeze. I had the seedlings spread out in different beds, so when I planted the 1014 seedlings in mid January, I also pulled the remainder of the Super Sweets and consolidated them into one bed. I was still in hopes I could get large bulbs from them. It quickly became apparent their only intent was to produce flower stalks which meant the bulbs had reached their maximum size. We finished eating them as large green onions in the early spring while the 1014 seedlings were just starting to grow.
Growing onions can be tricky with a lot of little details that need attention. I guess if you only want green table onions, the details are not so important. If you want large onion bulbs, you have to pay attention to the details.
I simply enjoy gardening!