I have a different mindset, that I can propose 
If it need to be instant, it need to be… simple in the extreme. I see too many features
The thing that I use when I’m around is my own private “notes” telegram channel
One tap, start writing, stop writing, close.
The fastest access, Telegram autosave, too, and put automatically even date and time.
Need a photo, I take a photo. Need video, I record a video.
When at home I transfer all to Obisdian and I can make notes, tags, and so on.
Things that need to remain “sticky” into the phone, can remain into the channel.
I already feel comfortable with telegram interface, so I already have the same usability for free.