In essence, the components marketplace provides support for easily removing one component and substituting it for an equivalent one. In addition, the component industry is a highly competitive marketplace based on features and price for many different categories in numerous distribution channels and across many geographies. ComponentSource, an online outlet for third-party software components, demonstrates the breadth and depth of the marketplace by listing over 1300 components in more than 100 categories and by over 280 vendors.
In addition, most component vendors offer special non-publicized services to support large deals and that will greatly reduce your dependability such as consulting, source code escrow, priority support and special pricing and OEM licensing.
The bottom line is that while you will find your typical component vendor to be a small, privately-owned and self-funded organization, it is likely your preferred vendor has been in business (operating profitably) for over a decade. This serves as a testament of consistency and resiliency through numerous technology and economic cycles. This means that the notion of your component provider disappearing or going out of business is simply a misconception.