Simplenote. It's a free notepad which syncs everything in it across all your devices. It's available for Android, Windows, Linux and IOS.
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simplenote.com
Why not
Google Keep then? It's a chrome app:
And can be opened as its own Window:
They promised integration with Google Assistant back in Google I/O 2018, not sure what happened there, Google being Google again.
For simple text lists with text formatting, reminder scheduling, archiving, collaborator, and image upload, plus option to open/send to Google Docs makes it really useful for when quick notes change to essays.
There's also this drawing feature, seems stupid:

(Apologies for the bad handwriting, was using a mouse).
Plus the OCR grab from text is perfectly fine:

Don't see the need to move to a different set of software when you can use Google's existing stuff for 99% of tasks.
And all of it is integrated at calendar.google.com:

And tasks is also there, though I don't use it as I have Jira for any work related stuff, and personal stuff gets reminder set by Google assistant (as can be seen on the calendar)
