I think if you're a senior software engineer at LinkedIn in silicon valley for a couple of years and then don't have enough to sustain yourself without additional income for a year after that then your lifestyle must be quite extravagant.
Sure ! To clarify, that's also my assumption, but I was wondering if he specifically decided to save money to prepare for the "writing" period ; or he if "accidentally" ended up with enough money to spare a year of full-time employment.
In any case, good for him, of course, no jalousy implied !
(Also, as for the "your lifetime must be quite extravagant"... Again, "fair enough", but apparently the whole "FIRE"[1] movement might beg to differ ;) )