Wouldn't this recommendation key (Last Viewed Item) allow me to use item-based recommendations on the homepage though? 

Theoretical question here. But first, let me say that I have already read https://experienceleague.adobe.com/en/docs/target/using/recommendations/criteria/recommendations-algorithms and still haven't found the clarity I'm looking for.  Imagine that I want to recommend articles to users who visit a n...

Is there a reference on how to create profile scripts like you described?

When will the new Flicker Management be available for general use?

100% seeing the same problems in the new UI, it's my new unexpected #1 concern/priority now, keeping me up at night.

I recently was given access to the new UI, and I too am now experience the "Invalid User Input" error preventing me from saving an activity built in the new UI. What is the resolution though to have solved this issue?

Ever since the new VEC Experience became available to me, I have not been able to access (or even see) any of my HTML Offers nor Experience Fragments when attempting to insert one into an activity. Mind you, if I go to the Offers tab outside of the Activities tab, I can still find and see every offe...

I am also having a terrible experience in the new UI, it's very confusing. I can't even see my modifications render in the new UI. I have to go back to the old UI to see them.

One of my category affinity activities has also stopped working, and I can't even find the modifications I used to have unless I go back to the old UI. Furthermore, the activity doesn't seem to be rendering anything for users visiting our site either.

I am also impeded by not being able to choose selectors in the shadow root.