Why Local-First Software Is the Future and Its Limitations

> Today, IndexedDB can typically store hundreds of megabytes to multiple gigabytes of data, depending on device capacity. Chrome allows up to ~80% of free disk space per origin (tens of GB on a desktop), Firefox now supports on the order of gigabytes per site (10% of disk size), and even Safari (historically strict) permits around 1GB per origin on iOS.

Does anyone else see this as more harmful than beneficial? It would be one thing if expanded storage were a new permission that I had to explicitly grant to a site, maybe with the ability to set a budget per site. As is, now every random website that I visit can store an arbitrary amount of data on my hard drive and it's on me to stay on top of that by clearing out data regularly (but hopefully remembering not to clear data from the sites that I care about!).

I don't think we can live in a world where arbitrary sites can store whatever they want on your computer—leaving it up to you to clean up the mess periodically—and at the same time the primary copy of important data from important apps is stored in the same way. In a world where people have to regularly clean up the mess left by hundreds of other developers, even a "local first" web app has to treat the data as only safe once it lands on the developer's server, which means the primary copy is on the server, not the device. In a few cases maybe it would be beneficial to have a full copy offline (maybe your users regularly deal with unreliable connectivity), but most apps won't benefit enough to be worth the hassle.

There's no user data sovereignty here until browsers give users sovereignty over who gets to store data in the first place.

> Yet each request still has a 100-200ms latency or more, which becomes noticeable in user interactions

    ping dawn-night-7975.fly.dev
    --- dawn-night-7975.fly.dev ping statistics ---
    6 packets transmitted, 6 packets received, 0.0% packet loss
    round-trip min/avg/max/stddev = 11.566/12.635/14.000/0.841 ms

so, 6ms each way from my house in the suburbs of Philadelphia, to the closest Fly region near NYC about 80 miles away. When measuring UI response latency, this is the number that matters. No, your database is not in the edge. But cached query results are!

I agree with most of the points made in the article and I think this is wonderfully written. But I disagree with the conclusion.

I want local first software to be the future. But even mobile apps, where much of this has been possible since day one, rarely work correctly offline. Unfortunately the user experience benefits vs the development complexities tradeoff mean that teams don’t do it unless they’re absolutely forced to.

Kudos to the developer of RxDB — he's been ahead of the now re-emerging lo-fi trend and put in consistent and high-quality work for years ! A fantastic SDK with excellent documentation & a large plugin selection, as well as fair licensing (i.e. free but some paid pro features to support RXDB dev) !

Surely something like a selfhosted docker stack is a better plan than storing data in browsers?

Browsers having state like that beyond simple cookies seems like a not great plan to me

I'm all in to local-first software and rxdb is a stellar project, very small nitpick - i wish they would support light theme for their docs.

One-time purchase, local-first software seems like nirvana for both developers and users: it respects users and simplifies development while providing financial compensation for developers.

I don't believe it, or expect significant stipulations, but I welcome it.

Is local first gaining any traction with non technical people?

Ironically, all of this was already implemented 30+ years ago — local storage, local code providing UI and data manipulation, seldom-connected model for dial-up or Internet, automated replication & conflict resolution with servers, DOD-grade security, etc..

It was Lotus Notes. Then IBM bought it and started ramping up pricing and walling it off.

I'm convinced that, had IBM gone the other direction and opened it up, they could have owned the Internet. Instead, Notes is just a forgotten footnote and IBM is... who are they again?