I can see why a simple text file is working for many people. Anything that requires you to wait for a program to start, a window to appear, or a webpage to load is very detrimental to the mental mode of note taking because thoughts change even on the slightest of latency. It should be as immediate as picking up a notebook from the table that has a pen attached to it.
I have a few scripts on top of the client to make things even easier like sprint to see tickets in the current sprint, jv to view a ticket, take to grab a ticket, transition to transition a ticket and slackscrum to push the tickets I've worked on today to slack for my scrum update.