optimism VS anycable-rails

I see it the following way: - Wrap a form into a Turbo Frame. - Attach a Stimulus controller to the form. - Listen for change events and perform a form submission (requestSubmit()) whenever an input value changed. - Use a specific parameter to distinguish real submissions from preview ones (e.g., by toggling a hidden input field value in the form): in the controller, do not call #save if it's a preview request; only render a form in response with validation errors. - The most challenging part: since the HTML contents of the form would be replaced, we need restore the cursor position and any new input data. I think, using morphdom solves this issue; that's how (I believe) Stimulus Reflex and optimism library in particular work.

For playing around with ActionCable just using it out-of-the-box is absolutely fine. As you mentioned in a production environment ActionCable becomes strained after ~1k connections (ref) but luckily with the help of anycable-rails the configuration changes required are minimal.