Had it been 18mb or 180mb, would it change anything? It takes seconds to download, seconds to install. Modern computers are fast.
It’s probably best to compare download sizes on a logarithmic scale.
18mb vs 180mb is probably the difference between an instant download and ~30 seconds. 1.8gb is gonna make someone stop and think about what they’re doing.
But 18mb vs 9mb is not significant in most cases.