Interesting, I work in the wind turbine industry (at the margin, and since one month, I guess I'm an expert), and it's the same, there are interesting sensors and data everywhere, but everything is locked down, and as long as the warranty runs, the owner of the turbine is at the mercy of a very reluctant maker for every maintenance task. The owner can't use any of those very useful sensors to assess the state of the…
And then what happens when the mfr. goes out of business? For example, see Clipper Windpower.
Depending on the contract the relevant design information may also put in escrow in the event the manufacturer goes under and spares are no longer available.
For comparison, Zond and US Windpower died more than a decade ago but the owners are still keeping the machines going. It can be a challenge but it's not the end of the world.