True.Problem is, much of the junk is nonmagnetic, like aluminum.
SR
Last Winter, had to re/re a transmission - a model not know for failure. No abuse (just 2, mature drivers in the house), but the planetary had grenaded. Rebuilt by a shop I trust (takes a lot, to get into that category in My Book). Owner said it was odd for that to go, in that model, but said it could have taken nothing more that a tiny needle bearing (Torrington is what I recall he said, I still need to look those up...) with a flaw, starting to deteriorate.... debris does the rest. Would have that failure have happened with extra magnetics in place (Magnefine, for example) ? .... I'll never know, at this stage.
I've seen (couldn't find it on the Gold site just now....) a reference that goes something like ".... filters particles in a way your oil filter can't...." .
Aside from being a careful product claim (doesn't state Better etc....), that ties to how I look at these type of quality made add-ons - Belt and Suspenders. Appeals to me, and not something I mind spending money on - yes, extra $, for an on-shore-made product is OK too.... and I'm not known for throwing money around.
Harder to find than the drainplugs, but conceptually, I like the idea of a magnetic dipstick. The Honda dipstick ones Gold have are similar to what is on my last Briggs (meaning style-wise, versus the older Briggs I have with a long-tube flat-bladed automotive style dipstick). Just Because (I can
Like Granny (Bev Hill's), I sleep better with some gold under the mattress !
(I get that at least 998 out of 1000 of a given model of gen will live-out a normal lifespan just fine, w/o extra magnetics...... just call it my OCD/Hate-On-For-Murphy showing
Rgds, D.