1 year in on my 580 AL and no issues. It was even handled by a complete doofus who tried to squish the cap on as if it were a marker or something.
The way I use my fountain pens has evolved though. I have this pen pouch that holds 12 pens (2x6 and then there's room for loose things) somewhat securely with a single elastic strap that does very well with really big pens. Most straps stretch to their maximum. Sadly the pouches are no longer made. I have a felt A4 sized cloth that's normally used to line boxes but I got the raw cloths at an arts supplies store. I use it to separate the pens from the loose pens, which are mostly plastic brush pens.
Whenever I use my pens I take out the cloth and place it on the table. Then my pens that I use will land on that cloth, never on the table. The cloths are Burgundy red and my pens and the cloths contrast with their surroundings so people immediately notice these are not your regular pens and everyone steers clear from them.
This all means my pens never or rarely suffer impacts, get little to no scratches and no doofuses dare grab them. So when I say my 580 hasn't showed any issues, keep in mind that I'm treating my pens like newborn babies.
>8[ This is a grumpy. Get it? Grumpy smiley? Huehue >8[
I tend to ramble and write wallotexts. I do that.