Ads is the reason Dart is still around, they saved the team after the project folded, after migrating from GWT to AngularDart, they weren't into doing yet another rewrite.
> Ads is the reason Dart is still around, they saved the team after the project folded,
Wasn't it Analytics which had Dart? But I do remember something about Ads saving it.
> they weren't into doing yet another rewrite.
It all depends on politics within the company. For example: youtube was hastily rewritten using alpha/beta versions of Polymer targeting Custom Elements v0. The moment they did that v0 was deprecated.
So within next 4 years they rewrote Youtube again with Polymer version targeting Custom Elements v1. The moment they did that, Polymer was deprecated and replaced with lit.
Even though they haven't rewritten Youtube, they've now spent time integrating Wiz, an internal Google framework (that also got merged with Angular).
The costs of rewrites don't matter at Google as much as promotions.
