Looks clean, but how are you organizing the "thousands of notes I had on Google Keep"? It looks like a single page of notes.
Is another form of organizing essential for you?
-- Allow regular expression search. -- Click outside the note to save. (Autosave every N seconds would be nice as well.) -- Customizable CSS. (Yes, I can do this with a local build.) -- Collapse/expand (sub)headings.
I'll give it more of a test drive over the next few days.
Auto save is already done, nothing you type is every lost. It's saved immediately (and synced every few seconds).
There is a collapse/expand feature but not for subheadings. If you put --- at the beginning of a line followed by a blank line it'll collapse everything after that, as shown in the demo note.
I did see the '---' collapsible and that helps but only if you have one section you want to collapse. I'm perhaps more visually-oriented than most, and being able to hide extraneous material helps me focus.
- level 1: collapse all H1 sections
- level 2: collapse all H2 sections
- ...
Basically like org-mode's cycle feature with the tab key. And then clicking on a headline will expand it.
Tags could cover most of my need for taxonomy/organization. (I'm hesitant to say 'all'.)
FYI I noticed a typo, "Github falvored markdown".
[0] I try for 'inbox zero' but am okay with leaving things in my inbox for a few days if I'm expecting to need them soon. Sometimes I flag for followup or color-categorize.