In-depth on customizing the jumpstart template. For example, I want to have Rspec, Guard, Haml and System tests preconfigured.

iOS Turbolinks mobile app

Using Contentful API to create a headless CMS with Rails + Vue

I would love to see an article comparing the pros and cons of client side image upload to S3 (i.e. jquery-file-upload) and server side image upload with some like Active Storage. I've heard that the client-side solution is better, but I don't know if that's actually true.

How to make an app comply with GDPR.

Microservices with AMQP (Rabbit)

This is a crucial thing and it's hard to find good resources.

1- Rails for Machine Learning
2- Rails with RabbitMQ and communicate with Python
3- Rails with React

This gems makes it easy to do queries with conditions on the associations of the model
https://github.com/MaxLap/activerecord_where_assoc

Add rating to users.
How to allow one user rate another user (using integer from 0 to 10) being all the same class (User).

Link previewer, potentially with help from Stimulus.
Imagine some kind of chat application, when pasting a URL, it should return inline a preview of the link including a screenshot of the page

VUE + UPLOAD FILE

Rails with Apache Kafka

Sometime deploy could result in system failure without one noticing.Is there any change to rollback to previous version by clicking a button?

Event Sourcing with Rails

ActiveStorage + editor Trix upload image!

You mentioned in one of your videos some time ago possibly re-creating Rails from scratch (I assume a smaller subset of course). I feel this would really help me get a better understanding of how Rails works, and teach my co-workers about it.

Crypto comparison site with extra watching tools!

Data Structures and Design Patterns in Rails.

The exact same Trello Clone project in React so we can see how the two compare...would be awesome.