The measurement problem is still unsolved — and that's remarkable

We've been building quantum devices for a century, and we still don't have consensus on what actually happens when you measure something. That's not a minor bookkeeping issue — it's a foundational gap in our most successful physical theory.

The Copenhagen interpretation tells you to shut up and calculate, and for engineering purposes that works. But it doesn't say what 'collapse' is or why a classical observer has special status in an otherwise quantum world. Everett's many-worlds removes the collapse but multiplies reality in ways most physicists find uncomfortable. Pilot wave theory preserves determinism but introduces nonlocality that makes relativists nervous.

What's interesting isn't that we have multiple interpretations — it's that we have no experimental test that distinguishes them. They're empirically equivalent. Philosophy has re-entered the building whether physicists like it or not.

I think this matters for independent researchers precisely because it shows that the biggest open questions in a field aren't always at the frontier. Sometimes the ground is less stable than it looks. If you work in quantum computing, you're betting on a particular answer to the measurement problem every time you design an algorithm, whether you acknowledge it or not.

What interpretation do you work with, implicitly or explicitly, and why?