I have made some analog interfaces by using perfboards or strip boards for a project which will run 6 months on a bridge but indoors and inside enclosures. The components were DIP package ICs and passive components. I also used conformal coating spray electrolube mostly at the solder sides.
I tested several times the circuits were working. But I am completely ignorant about life time or reliability of these boards. They will be powered and will process nonstop 6 months where I cannot have access.
Because of urgency, I didn't have time to spend drawing in a CAD program and obtain a PCB.
I'm not worried about not having ground plane and the circuits are working for low freq. applications.
I'm not expert in soldering and my biggest worry is that whether the solder joints would corrupt themselves after long time. But since the circuits were working I thought there is no cold solder.
Are there any problems using perfboard or strip board instead of PCB for such long durations? In other words is it a big risk or not to use stripboard or perfboard instead of PCB?