The event-stream debacle shows to me how crazy it is that lessons we've known for literally decades seemed to need to be relearned by the Node community every couple months (and I say this as someone who is primarily a Node developer now).

Back in the early 00s I worked on a software build system (Java) that had to be able to guarantee reproducibility of past versions of builds for code escrow purposes, and to do that it needed to be able to run builds without a live internet connection to ensure we didn't have unintended external dependencies.

The fact that bitpay didn't lock down their version numbers of dependencies, and are thus at the whim of whatever changes upstream of them are gleefully picked up, is crazy, especially for a crypto wallet.