O artigo é longo. Mas merece ser lido. Inclusive os comentários (que não são poucos). Num dos primeiros, Mr. Jacobson nos brinda com o seguinte:

Eclipse OPenUP has inspired by us introduced a precise practice concept. Problem is that this practice concept is designed to make process engineers happy, but not to make the developer community happy. It still has the flavor of old RUP. Although RUP includes many good ideas, it failed unfortunately dramatically in implementation.
...
I feel I have the right to critisize my own work. RUP was my baby so I have taken the responsibility to correct it in its basics.

É de chacoalhar bases... até porque nunca elas foram sólidas mesmo.