A lot of the article goes into trying to "multitask" your practice - building it into some minimal viable practice routine.
I would urge caution around this - in fact - deliberate practice is probably worth 10 times this. There's a reason people tend to plateau early in their efforts to master something. Once your brain figures out how to put the skill on autopilot you're going to find your rate of improvement significantly slower.
It's not just about the time you put in - it's about the type of practice you put in.