I have a SPA and have 'converted' it into a PWA. My motivation for that largely has been to better control the way assets are cached on the client, I can now control better with the service worker, but there is one really nice benefit:
With the PWA, android devices (hopefully iPhone soon too) can 'install' the PWA to the device without going through Google Play Store (in fact, you can have the PWA install the android app available on Play Store instead, if you prefer). This makes the web-page appear to the user as an app, with a nice icon, and snappy performance relative to opening a link in chrome (even though it is a chrome instance running the 'installed PWA')
Agreed. I had run a small BTC arb program for a bit a number of years back. The exchanges were shoddy, there was a persistent bias in the arbitrage such that you ended up accumulating huge positions of BTC on one side, and lots of short cash on the other. Couple that with the difficulties of withdrawing cash from the system, fees, etc., it was not worth the risk. But this is not new.
What's pretty cool about this -- though it appears this site is not focused on it -- is the opportunity for full triangle arbitrages among the various crypto's, such that you may do, e.g., a BTC->ETH->LTC->BTC trade and wind up with more BTC than you started with.
Another point to consider; the big players have moved into this space, if you want to get into it you will need to be sure you're not at an informational disadvantage.
I agree with the statement in the article that the current Web-of-Trust model is broken. I think that is one thing that the folks at keybase (keybase.io) understand, and I like their model. I like it enough, in fact, to actually use it, something that I cannot say about GPG despite having tried it on numerous occasions over the years.
GPG is proposing going to a TOFU model (trust on first use, much like ssh works). I'll be curious to watch if that takes off, it seems like a step in the right direction.
I think 'trust' as a concept is difficult to codify into a protocol. What alternatives are there that would be better than what keybase.io does, or what GPG is proposing?