I understand the theory that SSD drives are more “durable” than traditional rotational drive head types due to the fact they don’t have any “moving” parts and the corrosive effect of salt laden air but that would only affect the contacts or external electrical components of the drive not the internal part of either drive type.It's not mechanical. Contacts are usually gold plated. However, unless they are sealed somehow (and circuits conformally coated) everything is subject to salt air corrosion over a long term.
I totally get why an SSD might be better in an environment where the drive might get bounced around (moving sailboat) vs a desk.
SSD capacity and price are constantly improving but are still not competitive with traditional drives. It’s also debatable (perhaps in a different forum ) whether they are “better”.