How Many Times Can I Reuse My Yeast at the Homebrew Level?

Commercial breweries tend to reuse their yeast five to ten times. But typically two or three times is enough for most row brewers because you want to use a different yeast strain and it's already been two months to produce those. So I mean, you could go 99 times, 199 times. It's kind of all about those skills of collection, reuse, keeping the viability high.