I understand your concern, Sean, but do not fear as there will be further updates for RPi. The RPi3B is the platform that we recommend for commercialization - due to resourcing, an updated build for the RPi3B+ was stalled so this was kept at a stage where it's mostly for tinkering vs commercial solutions. The team is taking feedback from the 3B+ and will incorporate it into the late fall build I mentioned previously. I hope this answers your question.
My first question is, what do you want to leverage from the model 3B+ that you can't with the 3B? Aside from this, while we are planning to have a release in late fall 2019, for a better evaluation experience and for any commercial products, please use the Raspberry Pi 3B or other devices with supported Intel, Qualcomm, or NXP SoCs.