Thank you for that comment, @cmiles, I couldn't agree more!

I think that it's important to remember that there are both direct and indirect costs to "not changing something that's working".

If you don't keep abreast of change, then you're unable to be nimble enough to change when change is hugely advantageous.

Locking yourself into design decisions is usually cost-effective for the short term, but may be ultimately very harmful in the long-term.