I do, but only to support FOSS users in some communities that are not here [yet]. There is no opnsense community here in Lemmy, so when I see questions there in reddit, I help where I can.
However, my “bio” or whatever it is called in reddit, clearly states that I have moved to Lemmy permanently.
I am actually considering creating a opnsense community here and hoping that Franco will come and join, and take over ownership.
Depending on the coils number of windings, and the size of the tool it will magnetise it pretty well. I used to do this to screwdrivers before they came pre-magnetised. And they will stay magnetised for a very long time.
Most of the time the reason for becoming demagnetised is due to dropping the tool several (many) times.