My point exactly. There are a lot of things that have changed over time, not just in this area, but in many areas of guitar maintenance and repair. As time goes on, knowledge increases, and better, safer and in many cases, cheaper ways of doing things come along.
I have no doubt that the StweMac Fretboard Finishing oil is some sort of blended linseed oil, or similar type product, and that Mr. Erlewine is shilling the product. However, the statements in the StewMac description are thate in black and white, and are accurate.
Note alos that the use of "lemon oil" (which, by the way is mostly NOT lemon oil) is recommeded by Frank Ford, and sold by StewMac, yet more than one guitar maker has specified is to not be used.