SOLID isn’t very good, but most of the alternatives are worse. I mean if the author thinks the SOLID principles are vague, but then go on saying “it should fit

SOLID isn’t very good, but most of the alternatives are worse. I mean if the author thinks the SOLID principles are vague, but then go on saying “it should fit in my head” seems not like a good replacement. That is also very vague and arbitrary. Perhaps the author should combine them and it gets somewhat less vague.