The problem is that your presentation is not covering the various downsides of choosing "small-scale" software. There are tradeoffs and if you don't explicitly highlight them, it's a disservice to readers.

E.g. You mention that large-scale software for millions is "expensive". But small-scale software is also expensive in different ways. (Software used by only a few can be more expensive in time/labor/hassles because of lack of features, workarounds required, lack of tutorials, etc)

I've written several utilities in the "small-scale" software category for my friends to use and that experience has enlightened me that most people (who are not hackers & techies) should use "software for millions" as the default choice.

If you're one of those that chooses small-scale software (e.g. your old Lua v5.1 anecdote), I think you're already part of a self-selected group and you don't need blogs suggesting it to you. You also are willing to overlook the downsides.

I like most of Clay Shirky's writings on various topics but his particular essay on "Situated Software" which you cited is incomplete and misleading because it doesn't cover "software rot": https://en.wikipedia.org/wiki/Software_rot