It seems to use two different front-ends, Blaze and Quasar (why would one do that?)
yes and no. With alexander setup you seperate your backend and run Meteor as pure backend( headless) and use Quasar CLI like you normally do. You could use blaze for example if you want some gui at the meteor backend. The magic in all this is the connector package(https://github.com/Urigo/meteor-client-bundler) that will connect the 2 ( with ddp).
The beauty about this setup is that you have 1 codebase( the api folder is the meteor project inside quasar project) and can import code from your backend in your frontend.(like collections)
It also uses axios which seems similarly redundant with Meteor pub/sub through DDP. Quasar (why would one do that?)
You can also choose to use Meteor like a ‘normal’ rest api instead of sockets. In the starter kit I don’t think he uses axios at all.
I know it also confusing since:
About all those point I don’t know what the ‘official’ structure is right now. It has changed a lot over time. Does not really matter since it can be changed easily.
The great thing about using Meteor with this setup is that Quasar CLI is leading so you keep all the benefits of Quasar CLI, you can create SPA, PWA, Cordova ect. All this with the power of Meteor.
If you use the other package you will have to use Quasar in UMD mode and that is not an ideal setup. Using meteor in headless moe will only relieve yourself ( myself for sure) from creating a UI in meteor with blaze or react( Vue is a not a ‘prime’ supported front end library in meteor).
Nor does the folder structure below template/imports/ui to the folder structure below /src in the Quasar app structure guide App Structure - Quasar Framework
Quasar’s folder structure is different because it has changed too.