[dlbucci]

I completely agree! Throwing away your code and starting over is failing to atone for the sins of the past, and I feel like it prevents you from learning or growing as a programmer. That's why I don't think I'll ever rewrite something from scratch again.

To me, this was nowhere more obvious than from my old co-worker who was constantly trying to rewrite the internal site we worked on. First it was angular and coffeescript, but that was apparently unmaintainable after 3 months (!!!). So they rewrote it and then I joined, and it apparently made it to 6 months. Then we tried to rewrite it in TypeScript and React which blew 10 man weeks away before we abandoned it. And then he tried to do TypeScript and Angular again but it never launched.

Meanwhile, after the React debacle, I learned my lesson and focused on rewriting and rearchitecting the old code to follow more modern Angular practices (1.5 components and such), and suddenly the code didn't seem so unworkable anymore! Quality improved and features were added that made it a very popular internal site, still in use 3 years after I left that team.

So I agree, I think you should always try to improve what you have instead of starting over. (If only our UX designers would go for incremental improvements too...)

[rubber_duck]

Rewriting anything complex and actively used from scratch is not a good idea and the problems have been hashed out may times.

Having said that, angularjs and coffescript is a terrible software stack in a dead ecosystem, the best course of action is probably incremental rewrite - React is really good at that because it starts out as a small rendering library and you can incrementally replace stuff like routing etc.

[buu700]

For that example, I would just use Decaffeinate to migrate to ES6, upgrade to TypeScript + AngularJS 1.5+ best practices as OP did, and then follow the official AngularJS -> Angular migration path.

Considering they're two entirely different frameworks, Google did a good job creating a usable compatibility layer. This allows a relatively painless "ship of Theseus"-style transition where you have a combination of Angular and AngularJS components interacting with each other, until eventually it's just Angular components and you can drop AngularJS from the build.

[dlbucci]

I completely agree. On my next app, I was forced to use AngularJS (in 2017, somehow), but did get to use TypeScript (which is somewhat hobbled by having to use Angular templates), and this is exactly what we're doing now: rewriting components one-by-one in React. I love refactoring and React is much nicer, so I'm having fun with it :)