That is an interesting use of gmail drafts. I'm sure you stretched the usability to the limit and found pros and cons going to a wiki. I use orgmode, starting

That is an interesting use of gmail drafts. I'm sure you stretched the usability to the limit and found pros and cons going to a wiki. I use orgmode, starting with a buffer with a few headings, URLs, and paragraphs on a topic. The buffer may be killed the same day or turn into 100k words spread over a few files a few years later, still easily searchable with org-agenda or grep and automatically exported to HTML for viewing on mobile. I don't bother with images or mobile editing due to complications--those are the main drawbacks.