Do not worry if you have projects in the Arduino Project Hub they will be automatically migrated to the new form in the following order. Phase 1: Projects created before August 2022 will be ...

The Arduino Project Hub is freely accessible to all users. Whether you are a hobbyist, a professional, or an educator, you can take advantage of the vast array of resources available on the platform.

But if you want the Altair 8800 experience on a budget, you can build yourself a clone with an Arduino. [David] kindly shared the build details on his Arduino Project Hub post.