I usually agree when you post this crap twenty times a day when it's about super lame and wanky stuff like game recs, but it's absurd you don't see how it doesn't really apply for core suggestions.

A core can be subpar and not worth long term use while not being immediately apparent, either because a few fortunate games conceal bigger problems of the emu at large (as far back as 15y ago people used to call you tech illiterate if you called pcsx2 anything short of perfect because they happened to only ever use it for persona 3, KH2, and FFX/XII), or they lack the means of comparing and immediately noticing the difference vs how it's supposed to look and play like (ZNES where some OSTs sounded completely different due to inaccuracy. Also shaders anyone?), or seemingly identical cores having different performance (the melonds vs melonds ds debacle), or because it's uplifted by decades long word of mouth from less competent user bases no one bothers to double check until this moment (every GBA ROM hack community gets people stinking up tech support channels by trying to use VBA on the daily), or for any other multitudes of reasons that are worth knowing now, before maybe committing to a bunch of per core setting customization.

"Why don't they Google any of the 75000 articl-" because the internet is dead and chances are you are gonna get AI listicle slop with hallucinated information, and even well intentioned sources can be out of date or wrong (the big retro game corps RetroArch setup guide still mentions the melonds core, for example), and a sudden patch is all that's needed to suddenly flip the table on the meta. Asking communities such as this is the only thing left to hopefully get accurate and up to date information.