Speculation generates 99% of the noise in crypto but technology does keep moving forward. L2s were just whitepapers a few years ago, now there are multiple full featured optimistic rollup L2s (e.g. Arbitrum); zkRs, which are much more complex, are getting close. Lots of complex applications are now running on single-app StarkNet (e.g. derivatives platforms like dydx) and like you mentioned, the multi-app network is in alpha.