Single player game teams often make their timeless and flawed diamonds of video games as passion projects, that are still products you buy
Gold standards of game design and technology only ever really derive from these teams

Online/MMO/mobile/gacha teams make...uh. Very contrived 'games'. Usually born from the market itself
Designed to make as much money as they can off of very specific people that will play it endlessly
Not designed from a source of inspiration and born from a passion. Only a corporate desire for indefinite money printing machines
Kept afloat for decades by literal microtransactions and membership fees. Never ending games often filled with blatant third rate game designs and poorly implemented technology