You can't look at ceaselessly changing phenomena -- capitalism can't exist without changes -- and identify which are "great structural continuities" and which are "rather profound changes" unless your _theory_ is sparse and constant. There would be no identifiable structural continuity if you kept changing theory every time you encounter a new phenomenon.
Here's an example of conjunctural analysis:
***** The Political Economy of Intellectual Property by Michael Perelman
The dramatic expansion of intellectual property rights represents a new stage in commodification that threatens to make virtually everything bad about capitalism even worse. Stronger intellectual property rights will reinforce class differences, undermine science and technology, speed up the corporatization of the university, inundate society in legal disputes, and reduce personal freedoms.
We have no precise measure of the extent of intellectual property, but a rough calculation by Marjorie Kelly suggests the magnitude of intellectual property rights. At the end of 1995, the book value of the Standard and Poor (S&P) index of 500 companies accounted for only 26 percent of market value. Intangible assets were worth three times the value of tangible assets.1 Of course, not all intangible assets are intellectual property rights, but a substantial proportion certainly is....
<http://www.monthlyreview.org/0103perelman.htm> *****
Some profound changes indeed, but do we need to change theory to make sense of them?
Yoshie