I have found the same. Stressing to make massive progress or sneak in a 6 hour session makes me burn out super quickly, and the inertia of starting a bigger feature makes it less likely that it will happen.

I have shipped a few web projects this way and found it's been just as useful for game development. In the rush to see progress I burnt out learning last time, but this time I am making serious progress with just a small task each day or every couple of days.

Also adding minor bugs that are turning into rabbit holes to a backlog for later helps keep me motivated.