Donald Qualls
Subscriber
Pinholes will develop over time, use, storage conditions, etc.. there is no “permanent” bellows.
While true, the issue with the Aletta was that the (nearly new) bellows was slightly translucent due to material choices. At the time I had it (around 2005) the Aletta was a fairly fresh design, and I knew the bellows had this problem when I got the camera. If I'd liked it, it wouldn't have been terribly difficult to make a replacement bellows (no taper, square section, big enough to get a hand into -- as easy as they get), and minimizing time with the dark slide out limited the fogging. But with poor lock down and no mechanism for fine focus, I could see the limitations after only a couple film sheets, so I traded it on to get the Graphic View.
With well made bellows (those with actual leather) good storage and very minimal maintenance can keep them light tight for more than a century. Seems good enough to just keep a (mental?) list of the ones that are of lesser quality, like Ansco 6x6 folders...