I would argue that SolidWorks has been doing a good bit of innovation. The fact that its been stealing more and more market share over time speaks to it.
Each new version of SW introduces new "features" (some genuinely useful, some shiny marketing gimmicks) and a host of new bugs. Software churn at it's best. Gotta release a new version to make money, just fixing bugs isn't profitable. Oh, and make sure file formats are not backwards compatible, even if for no good reason but to force upgrades.
