This paper investigates the concept of lineability for families of real-valued functions, a notion first introduced by Vladimir Gurariǐ in the 1960s. Assume that \(|\mathbb {R}|\) is a regular cardinal and that \(\mathbb {R}\) cannot be covered by less than \(|\mathbb {R}|\) -many meager sets. Our main results establish that the families of Sierpiński-Zygmund functions in three different Darboux-like classes are at least \(\mathfrak {c}^+\) -lineable, yielding lineability coefficients strictly bounded below by \(\mathfrak {c}^+\) . Since it is known that these families can be maximally or minimally lineable in different models, our findings also provide insight into the relationship between set-theoretical assumptions and the lineability of function spaces.
