I have been trying Short Form content myself. LeoThreads is my favorite, haven't tried Threeshorts yet. Everyone uses @liketu for posting pictures but I have been using it to publish lists, guides, frameworks, etc.

Here's a good example: @finguru/10-chat-gpt-prompts-to-learn-copywriting

I think more and more of my followers have started appreciating such posts. It goes perfectly with your definition of stackable content.

It is the future. LFG! ✌️