Comment by jascha_eng
10 hours ago
None of his math really checks out. Building a piece of software is or at least was orders of magnitudes more expensive than maintaining it. But how much money it can make is potentially unbounded (until it gets replaced).
So investing e.g. 10 million this year to build a product that produces maybe 2 million ARR will have armortized after 5 years if you can reduce engineering spend to zero. You can also use the same crew to build another product instead and repeat that process over and over again. That's why an engineering team is an asset.
It's also a gamble, if you invest 10 million this year and the product doesn't produce any revenue you lost the bet. You can decide to either bet again or lay everyone off.
It is incredibly hard or maybe even impossible to predict if a product or feature will be successful in driving revenue. So all his math is kinda pointless.
> Building a piece of software is or at least was orders of magnitudes more expensive than maintaining it
This feels ludicrously backwards to me, and also contrary to what I've always seen as established wisdom - that most programming is maintenance. (Type `most programming is maintenance` into Google to find page after page of people advancing this thesis.) I suspect we have different ideas of what constitutes "maintenance".
> that most programming is maintenance.
What do you mean by maintenance?
A strict definition would be "the software is shipping but customers have encountered a bug bad enough that we will fix it". Most work is not of this type.
Most work is "the software is shipping but customers really want some new feature". Let us be clear though, even though it often is counted as maintenance, this is adding more features. If you had decided up front to not ship until all these features were in place it wouldn't change the work at all in most cases (once in a while it would because the new feature doesn't fit cleanly into the original architecture in a way that if you had known in advance you would have used a different architecture)
I like the good ol' "80% of the work in a software project happens before you ship. The other 80% is maintaining what you shipped."
The longer software is sold the more you need to maintain it. In year one most of the cost is making it. Over time other costs start to add up.