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Probably not very often.

Next time you're flying across the pond, try coding (without bothering to subscribe to onboard wifi).

Also, it can be useful in places where steady internet is sketchy, which is a lot of places.

The folks at 100 rabbits [1] would be happy.

[1] https://100r.co/site/working_offgrid_efficiently.html

Right, but I think those situations are far and few between. If you're a person who is regularly without internet access, there's probably better areas to work in than the web where you may need to deploy emergency fixes on short notice.

And regardless, it seems like offline web API documentation would make more sense as a one-time purchase? It's not like the web is rapidly evolving at all times, with major updates being released annually. It's a good chunk of years before enough browsers are updated to support new APIs, so if you grabbed the current docs you'd probably be able to work with that for a while.

> offline web API documentation would make more sense as a one-time purchase

Stingy me would just wget download the entire documentation if I anticipate that I might go offline.

Can't say I'll ever be okay with paying for documentation; I don't want that to catch on.