To me the 300 wsm is the optimum compromise cartridge, wanna slam big old .308 bullets ... go long action. Wanna fling uld lighter bullets... go longer tube and smaller caliber. It Doesn't fit in short actions with really long bullets, kicks a might in mountain rifles... It probably does nothing the best but load 165 -180s and it does every thing you need out to 500 maybe 600 yards.
The 30 cal bore objectively looses less fps per inch at 20 than the smaller bores. Having had both stubby length wsms at the same time it's non trivial although most animals can't tell about 100 fps.
My biggest selling point was in the fall a little before the Kung flu, in king cove we wandered in to the little store and they had maybe a dozen cartridges 223, 243, 6.5 manbun, 270, 3006 300 win, 338 win, some 4570... the usual safe bets for there but nestled in between 06 and win mag was 300 wsm. Figure it's reached dang near complete acceptance if a store literally in the middle of nowhere stocks it.
If you can accept it's a compromise round, it's probably the best of those.