Blockchain
Blockchain isn't the answer to everything (and that's fine)
In recent years, blockchain became the answer to practically any technology problem, even when the problem had nothing to do with what blockchain actually solves. The result was a lot of expensive, complex projects solving in ten steps what a regular database would solve in one.
Blockchain genuinely makes sense when multiple parties that don't fully trust each other need to agree on the same record, without depending on a single central intermediary: supply-chain traceability, contracts between different companies, a history that needs to be auditable by everyone at the same time. Outside those cases, a well-built traditional system is usually faster, cheaper, and simpler to maintain.
The right question isn't "can blockchain be used here?", almost always, it can. The right question is "does this problem actually need distributed trust between different parties, or does it just need a well-built system?" Answering that correctly saves months of building complexity nobody will use.