Comment by bandrami
It's less monolithic in the sense that instead of one creaky unmaintainable ancient mass of software doing the actual rendering gruntwork there are now five (and counting) somewhat incompatible slick untested new masses of software doing it in slightly different ways that application developers have to worry about. It's kind of a pick your poison situation.
IME it's always best to read any claims of "unmaintainable" as "not as fun as designing something new". Nothing is truly unmaintainable if the will is there.