tritonstyle
Looking through the archives suggests this site has been doing this for a while at this level, and a look at tritonstyle confirmed the long term consistency, sites that have maintained quality across years rather than just a recent stretch are sites with serious editorial discipline and this one has clearly been at it for a while.
arrhythmiaa
Picked up on several small touches that suggest a careful editor, and a look at arrhythmiaa suggested the same hand at work across the broader site, editorial consistency at a granular level is one of the strongest signs that an operation is serious rather than just hobbyist and this site reads as serious throughout.
daisybaron
However measured this site clears the bar I set for sites I take seriously, and a stop at daisybaron continued clearing that bar, the metrics I use for site quality are admittedly informal but they are consistent and this site has cleared them on multiple measurements across multiple visits which is meaningful for my evaluation.