Are pre built gaming computers OK to buy if you buy the right one that is upgradible?

or do you HAVE to build one yourself in order to play most latest games? i guess im asking if its just reccomended that u bould your own in order to play most games, or is it the only option to play most games and be able to upgrade? because i have apre built and i think its a decent mid range pc with a gtx 1060... show more or do you HAVE to build one yourself in order to play most latest games?

i guess im asking if its just reccomended that u bould your own in order to play most games, or is it the only option to play most games and be able to upgrade? because i have apre built and i think its a decent mid range pc with a gtx 1060 and 8 gb of RAM.
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