First I would like to express the following is my own opinion and experiences with Standard Notes. Therefore I would also suggest you join the Standard Notes Slack, which is very active and filled with people who are very committed to Standard Notes.
I used Standard Notes for about six months because it was on every platform. Unfortunately, that also caused a lot of issues in the end, which is why I switched. The app built with Electron, at least I believe it was built with Electron, and I could be wrong. Therefore it is a glorified web wrapper, which on the one hand makes the app seamless between platforms but on the other makes some functions and features that are normal on those platforms unusable with Standard Notes, or Slack which is also built using Electron.
My issues were related to getting text into and out of Standard Notes. Sometimes the copy/paste keyboard shortcuts would stop working so I would need to restart the app, which when you are trying to get text quickly became a huge inconvenience. I often create lists in my notes, whether they are checklists or just lists of information, usually this is done in another application or comes in via email. Copy and paste into a note would often ruin the structure. On Windows I ended up having to use Notepad++ with a regex to clear formatting and make it suitable to Standard Notes, on macOS, BBEdit did the same thing.
With all this said, some people really like it, as I said check out the Slack, but I’ve also found others with the same issues I have and therefore if you are copying and pasting out, and into your notes application I would be cautious.
I would suggest you also check out Notebooks, the app I am currently using, which has apps for macOS, iOS, and Windows, Notebooks syncs via Dropbox or iCloud because they are just plain text files in a folder structure. Which means if you need to get to a text file from a device without Notebooks, you can sign into Dropbox or iCloud and navigate to your notes.