I would like to have a feature of saving a draft of a question and not just having to complete the question and send off.
This is part of the Stack Exchange mechanism for posting
"Drafts are stored in redis for 7 days, with each site having storage for one draft question and one draft answer per user."
for a clearer answer Allow questions to be saved as drafts prior to posting
One technique I use (frequently) is to copy the entire contents of a draft and paste it into a local text document.
If you want more capabilities than that, you can preview, save, and manage your drafts on the StackEdit site at https://stackedit.io/app# .