I agree with much of what you've put, pheaton. However, the LMS 10000 bunch haven't been put off, & frankly much of their gear will be pretty basic - no modern electronics in the control systems for a start - all discrete components that will be easier to obtain & change for a while yet, unlike much modern stuff. The heavy stuff; yes, more expensive to manufacture from new than many steam locomotive parts, but again, straightforward in engineering terms.
Mark