As the minimum viable product approaches the complexity of a complete product, the difference between the two shrinks to the point that the concept of MVP isn't all that useful anymore. That's the actual case against Lean Startup in 2024.
To be clear, I personally think MVP is still an immensely useful concept, but Reid's own 0-100 scale makes it hard to understand that. There is no 100. Most SaaS, and user-facing software in general, must be developed and maintained perpetually. It's not about approaching 100, it's about approaching a limit at infinity.
Today's MVP identifies a local maxima that's a composite of two axes: user experience, and technical debt. If that sounds surprisingly similar to the original definition, that's because it is.