Why we still hand-build every system (and always will)

A template gets you to a demo in an afternoon. It gets you to a business that fits the template — which is fine, until your business does the one thing that made it worth building software for in the first place.
We hand-build because the value is in the fit. The exception your team works around every day, the rule that is yours and nobody else's, the integration that has to speak to the legacy system you cannot replace yet — that is exactly the part a template cannot hold. Bend the template far enough and you have written custom software anyway, just on a foundation you do not control.
Hand-built does not mean slow or precious. It means senior engineers writing code that is reviewed twice, tested against your real edge cases, and demoed every Friday so there are no surprises at the end. You own all of it, source included, and it does exactly what your business does — no more, no less.
The economics only look favourable for templates at the start. Over the life of a system, the cheap thing is the one that fits.