Aiii, looked like I’m being talked here lol.
Well, talking about updating many books needs a huge amount of time and patience.
First of all you need to increase your WPM(words per minutes).
My WPM easily exceeds 54-55 when I type on my laptop while I use phone, it range a roughly around 60-70 WPM which means that I can write one chapter worth 1.5-1.6k words in 30 mins.
So when you consider updating 10 chaps for 10 diff novels it would take 300 minutes which isn’t roughly 5 hours but I take a total of 6 hours cause you can’t possibky maintain that monsterous WPM continuously.
So ya, the main factors are time, patience, concentration and the most important is that you yourself are interested in it.
Tbh, if you aren’t interested, it will feel like burden to write and you will keep looking at the words count again and again!