Now that I understand the mine field I’ve wandered into I will tread very, very carefully, which for me means more lurking and less posting...
I should add as a contribution that for me, out of all the IEMs that I have (the ones I have purchased this year listed earlier plus previous ones - SE846, W50, W30, SE215, Echobox Nomad, Starbrick Beryllium, Massdrop Plus, and others I am probably forgetting - the SF8 are my favorites. For me - good detail without being too bright or sibilant, punchy bass without bleeding into the mids, mids that are forward enough (though I do think they are a little back). Build quality is great, fit is great, seal even with the included tips is great (which for me is a near miracle). My next favorite would be the DM6. Its biggest fault is tuning at the frequency high end which makes it very sensitive to tips, tip insertion, seal, sources, and can be sensitive to some people who are more treble sensitive. It isn’t a forgiving set in the least - which then because there are such disparate experiences with it gives the impression of QC issues, etc, when I think that a simpler explanation is that it is simply tuned too close to the edge... but I like ‘em...!