There is no reason to buy modern western games on launch. They all launch in a worse, more expensive state than they'll be in 5 years later.
Everything needs years of patches and DLC now to feel complete, why not get it for $5 when it's finally done?
Even Japanese games are getting to this with the way MHWilds launched, but sadly some are completely dropped afterwards like DD2.

>make a video game
>can't find anything about your specific question online
Game dev thread