Creating Personal Templates in MuseScore 4

I guess "roundabout" to one person is quite straight forward to another one. Are you doing something mote complicated than just saving a score set up how you like it to your templates folder - as described here https://musescore.org/en/handbook/4/templates-and-styles

And which is pretty much identical to how it works in MU3.

I would like to add:

• one measure in the template file is enough
• There don't have to be any notes in it
• Time signature and key signature are also irrelevant
• The title etc. is also unimportant, but you should adapt the font and size in the style properties to your own wishes if you want to deviate from the default settings.

The number of measures, the time signature and the key signature are queried when you create a new score using the template.

To be clear, that thread you reference is about MuseScore 1, not MuseScore 3. Roundabout methods were indeed needed ten years ago, but haven't been since then. MuseScore 2, 3, and 4 all support saving directly to your personal Templates folder (Documents/MuseScore4/Templates, right next to your personal Scores folder).