IMO, "boring" is exactly what Bitcoin should be right now. It's becoming normal.
Ethereum does have a lot of really interesting things going on that are super cool. But I wouldn't take this to mean that Bitcoin isn't developing or that it has somehow become stodgy or less relevant.
Bitcoin's developments are more the field of payments, decentralization, and privacy. These parts are not flashy, but are absolutely fundamental for its usability as money and store-of-value in the future.
The biggest differentiation though is that Bitcoin has an explicit inflation rate while Ethereum actually has no specific monetary policy at all. It is up to the devs and its scarcity could be undermined.
They're both extremely interesting for different reasons, but for those of us who got into crypto through economic reasoning about the gold standard, scarcity, government control of the money supply, etc. - the things many have seen for a really long time as the problems at hand - Bitcoin is by far more directly addressing them.
It's "boringness" at the moment means these objectives and economic motivations are becoming more agreeable.
