I knew one person yes, ultimate Sega fanboy, only had Sega consoles (and all of them), bought only games for Sega consoles and nothing else, not even computer even though they had one.
He had lot's of games, bought everything the Sega magazines told him to buy like Guardian Heroes, Sega fans tend to be like this, only cared about Sega and that's why Sega consoles tend to have a great attach rate. The only thing he didn't do was import which for a Saturn fan in Europe was surprising to be honest.
Sega magazines in Europe talked a LOT about imports because I mean, if Americans thought they had it bad with Saturn releases they should check European releases and how grim that was:
https://www.satakore.com/sega-saturn-complete-european-game,,1,,0,,1.html
Note that his list includes games that were only released in 1 or 2 countries too.