"Obsolete" and "centralized" are specific accusations that I backed up with analysis.

The charge of obsolescence is justified because NXT, as a script based platform, has orders of magnitude less state space (and hence functionality) than a modern, Turing-complete distributed computer.

The charge of centralization is justified because NXT tries to cram too much into the base protocol and relegates additional functionality to "plug-in" status, rather than the proper approach of a neutral platform running DAPPs.

"Centralized" is also an apt description of NXT's economic distribution, with a tiny handful of insiders controlling the vast majority of tokens.

"Junk" is exactly the right word to describe NXT's heaps of objectively useless, and almost completely abandoned, middleware code.