When was the last time you did any development without internet access though? For me at least, I've found it to be pretty much a necessity.

I travel a lot by train, which means a broken internet connection most of the time. Or when I stay in hotels or on a customer's site without wifi (3G doesn't always work well enough).

I gave a personal instance of the Cloud 9 (https://c9.io/) IDE a go a year or so back. Using git locally and enabling git on the server gave me collaborative and offline options.

I think some form of VCS access to these services determines their ultimate usability.

Can't speak for parent, but for me: on a train (lots of tunnels - no really, lots of tunnels[1]), on an airplane and in an airport (no free wifi) -- quite recently.

[1] https://en.wikipedia.org/wiki/Bergen_Line#Line

Side-note, the Norwegian broadcasting service, NRK did a pretty crazy stunt filming the whole thing, and airing it on tv: http://nrkbeta.no/2009/12/18/bergensbanen-eng/

I have a complete copy of my production environment running locally in vagrant. I can code and run tests (3rd party APIs are all mocked) without any internet connection. I even have all the docs I could need cached offline in Dash.

The only thing I am missing is a local pypi to cache my commonly used 3rd party apps.

I use my laptop a lot on the go. Trains, Airlines, Pubs, Coffeeshops, and so on. Some places will have Wifi, or others I'll be able to tether. But I don't like to rely on having it to be productive.

Keep a copy of your favorite Bootstrap/Foundation.

Have XAMPP running or some local server. Go have a blast.

Daily, on the train :)

Every time I fly.