lame 3.90.3 is still used of huge codec centrals, because it is
- still the most tested one in mp3 codecs with amazing results
- still most compatible on file check progs for ftp sites / hdd scans
- integrated in all codec central's progs (that's the main reason why they still not switch to newer lame versions: they're simply afraid of unknown bugs)
- when people order their albums, they mostly select 3.90.3 encoded tracks to download (I don't know why, maybe when they see 3.90.3 encoded, they say it's great quality or whatever)
- almost all bugs of it are well-known of them
I asked some server admins who store audio data. I received most often these answers.
Also "private music societies" store all cds compressed to mp3 or other formats, where all files have the same codec (to provide highest compatibility). Small societies already have updated to 3.97, because they didn't detect any errors. But the big ones

have a lot to do for updating... testing, testing, testing, updating the other files and so on. And some of them simply don't do it right (like transcoding from lossy to lossy and so on

) and then they say "uh, we don't achieve advantages with updating haha"...
That's the reason why I don't use public download servers for mp3 sources... You always don't know where the music really comes from, and that's why I don't like it.
as a conclusion I'd say it's not that bad that these rip societies don't update to newer lame versions. For those who download the albums, they often even don't know what mp3 means exactly. In other words, they won't can tell the difference between cd and lossy encoded either.
Who said in the times where 3.90.3 was standard that it was audible if it was a cd or a 3.90.3 encoded file? If the 3.90.3 encoded one sounds amazing enough, why changing codec then?
I don't want to say that 3.97 and newer is worse than 3.90.3, on the contrary, I think 3.97 and newer is a lot of better than 3.90.3 (speed, qual/size ratio, problem samples improved...), but if 3.90.3 also can do the job as a cd replacement encoder.... then it will be so forever (ok, let us see what the future will bring

) just like 3.97.
But I can't understand why some private rippers (who rip their own cds) still are using 3.90.3.... That's not explainable except of placebo.......
3.97 / soon 3.98 are recommended.... the points on wiki and HA recommendations are self-explainable.