I've got a '98 Delica that I have used and abused for the last four years and it has held up great! The clip has been hit and twisted. The "walls" of the clip-hollow are no longer square. Any time this happens I just whip out two nickles and tighten the barrel-screw back down. No problems. The blade steel is ATS-55. I must be one of the few people who has never had a problem with this steel. I touch up the blade once a week and it still shaves hair. I've re-painted the clip twice. I also have the new black-bladed, olive handled Delica and it is tight as a drum. My EDC Delica has a very slight bit of up and down blade play, but this is normal in lockbacks. I love this knife and I am planning to order the black-blade, black handle Delica to add to my collection-within-a-collection. (I mainly collect Spydercos but a good chunk of that collection is Delicas) Take this for what it is worth, as it is one person's opinion.
Flinx
PS: after all of these years of use, the blade of my EDC Delica started to get loose, so I put it on a vise at work, and gave the pivot a good tap with a hammer and a punch and it is good as new again.