Not at all. I think we should all be using the full potential of our preferred system instead of sucky abstractions that provide the lowest common denominator of features.
Portability is overrated. Portability between POSIX systems is especially overrated. Linux and the BSDs have powerful exclusive features and people should be using them as much as possible in their software, simply because it's better than the legacy POSIX nonsense. This also applies to the features of Windows, macOS, iOS, etc.
GNU Make is powerful, ubiquitous and portable. That makes it even more pointless to avoid it. I won't claim it's perfect but it's absolutely a hell of a lot better than some "standard" POSIX variant of make that virtually nobody actually cares about. GNU Make will be present in pretty much every system capable of compiling software. Everyone is used to running make to build things. Avoiding things that make life easier because POSIX is pointless masochism.
Portability is overrated. Portability between POSIX systems is especially overrated. Linux and the BSDs have powerful exclusive features and people should be using them as much as possible in their software, simply because it's better than the legacy POSIX nonsense. This also applies to the features of Windows, macOS, iOS, etc.
GNU Make is powerful, ubiquitous and portable. That makes it even more pointless to avoid it. I won't claim it's perfect but it's absolutely a hell of a lot better than some "standard" POSIX variant of make that virtually nobody actually cares about. GNU Make will be present in pretty much every system capable of compiling software. Everyone is used to running make to build things. Avoiding things that make life easier because POSIX is pointless masochism.