Star gazing and Satellites

I remember looking up to the night sky 40 plus years ago and being in awe of seeing 2 or 3 Satellites pass overhead in an hour.
Last night I was in the Aussie bush, 100 km from Perth, stargazing.
What astounded me was the number of satellites I saw. Considering I could see 180 degrees of the sky, I never looked south or west, 21 satellites passed my field of vision in approximately 30 minutes.
At least 3 times I would see 3 satellites at the one time.