Trying to design for many unknown futures is expensive. Changing in the future costs something. Designing for future changes up front makes sense if cost(futu

Trying to design for many unknown futures is expensive. Changing in the future costs something. Designing for future changes up front makes sense if cost(future change) > cost(future proofing) SAAS? Do virtually no future proofing. IOT, do some. Space probe? Do lots. Also, if you haven't built quite a few relatively similar systems, don't do future proofing without talking to people who have.