some of my earliest memories are of my dad building a 120 gallon in wall tank in the basement, and of my grandfathers stacks of 10 gallons in their back room. anemones on one wall, guppies on the opposite wall.
while the numbers of tanks decreased, my grandfather bred guppies until (literally) the day he died.
my dad gave up on the hobby a few years ago at the age of 73.
I'm still going strong from my first tank at 9 years old and I'm heading hard into 50.. my brother is getting back into it after a few years off, despite being responsible for shattering my first tank while playing fetch with the dog using a real bone.