Oh wow, yeah my first mobile game studio had a huge industrial fastener shelf with little drawers stuffed with different phones. We started in 2004, and feature phone game dev was indeed wild. We did a lot of WWE games in 2d and 3d, needing ~15 different reference builds ranging from 64k 2d builds to 800k 3d for high end, plus another set for all the BREW devices. Managing code, asset pipelines, and qa across high/med/low 2d/3d Java/cpp permutations was a huge challenge, but it was so satisfying to be good at. I love what mobile has turned into, and never want to debug another random c crash on device ever again, but I do miss the cabinet of phones and all the crazy variation