Institutional control is a design requirement.
Modernization succeeds only if the institution can still understand, direct, and change the system after implementation.
A technically modern market can still be institutionally weak if essential knowledge, authority, data, or operational leverage resides outside the institution that is accountable for the market.
Vendor dependence is not inherently a failure. Specialized providers often supply capabilities that would be inefficient to reproduce internally. The critical question is whether the contractual and technical architecture preserves the institution's ability to direct material decisions, access complete records, test controls, change providers, respond to incidents, and understand the system well enough to exercise its mandate.
This makes portability, documentation, interfaces, data rights, training, configuration visibility, exit support, and transition planning part of market architecture rather than procurement boilerplate.
The objective of modernization is not technological ownership for its own sake. It is durable institutional capability.