Agreed-ish, in general, on the thankfulness at least.
I've starting reading /. back in the mad mid-90's, eventually overcame my fear-of-registration, and have been a (semi) contributing member ever since.
Oddly, my only request these days would be to find a way to post -fewer- stories. I can't keep up with the current deluge and the "themes/tags" don't help because my actual interests don't break down cleanly into existing tags and I can't spend the time to be the first person to curate a new tag and filter it out. In the beginning, /. itself WAS that filter... if it made it in I could be assured that it was probably worth a few minutes of my time. The problem now isn't /., it's that there's just TOO MUCH STUFF happening all the time, and we know about ALL OF IT.
I do (and will continue to) keep /. in my RSS reader (with all my other visited blogs, internet entertainment, and newsy sites), but it has been becoming increasingly less attractive and somewhat redundant compared to other (more or less) curated news sources like TheRegister or ArsTechnica. I don't know what might be done differently, and I certainly don't know if those changes would make advertisers and investors happier, but I'm just throwing that out there as the sad, lone datapoint that it is.
Carry on Slashdot. Carry on.