Yep, that’s definitely a concern with hardware projects. I guess mass produced hardware doesn’t run into the problem as much because there’s funding for upfront bulk component purchases.

At least with open source hardware you could theoretically modify the hardware to use an alternative component, even if it’s no longer commercially viable.

For a lot of open source projects you can pretty much just source everything from DigiKey or Mouser, so you can buy them all atomically.