Fair enough, in some careers you may see them more. In normal day to day life I’d say even decimeters are uncommon. You get deciliters in recipes when cooking, centiliters are often used for alcoholic beverage bottles, centimeters are the most common. Deca I think is especially rare, hecto is something you might see used with pressure (hectopascals apparently are equivalent to millibars), but even that is fairly uncommon in day to day usage.

To be fair, I did learn about deca and hecto in elementary school, but it was so long ago and I haven’t really seen them used since lol