Get Into Fashion or Get Extinct
The well-known Lindy effect appears to hold true for technology — it's no accident that some solutions have stood the test of time. For example, Object-Relational Mapping (ORM) continues to be relevant as long as we rely on relational databases in combination with object-oriented programming languages. Both concepts have a bright future ahead - OOP for instance has the most focus in terms of engineer training while technology-wise OOP languages hold sway over enterprise and open-source code development.
Calling a system "legacy" (often used with bad connotations) simply means it has proven business value, received significant investment, and is unlikely to undergo major changes. This is why relational databases are expected to remain prevalent—not just because they represent a foundational data model, but also due to the massive existing codebases and business reliance on them. On the other hand non-relational databases still lack the maturity to fully address certain critical aspects of data management and security, so it is hard to convince a bank, airline or a hospital to use them for their critical systems.
Moreover, a solid grasp of ORM concepts makes it easy to switch between technologies. For instance, if you're experienced with Entity Framework, picking up JPA is straightforward, and vice versa.
In contrast, quantum computing, despite all the hype and theoretical promise, is unlikely to have a near-term impact. Its practical use cases are currently limited to specialized problems and even those applications are widely debated on whether quantum computing really is a better solution. Meanwhile, technologies like web development and cloud computing, which were once the domain of large enterprises, have become mainstream. It's hard to imagine quantum computing following the same trajectory anytime soon. However, almost everything that hasn't yet moved to the cloud will likely make that transition eventually.
Cloud becomes personal, after conquering the world of business (albeit there is a growing movement for cloud repatriation) - personal data is already on the cloud and that means there is not much data or compute for public cloud to absorb.
Despite major privacy transgressions it seems societies at large are happy to exchange personal freedom for convenience, so I do not expect major technology developments in the digital privacy space.
The widespread adoption of digital identity — for example, across the European Union — could however unlock new types of digital services that are currently unimaginable (e.g. fully digital marriage).
Some technologies may reshape lives dramatically, but the foundational ones — those critical to how our society operates — are unlikely to disappear any time soon.