Seriously, SA is just the flip side of Flying these days. There are a handful of decent technical articles, but the vast balance is "hey, look, I spent an unprintable amount of money restoring this warbird to add to my collection", or "I'm dialed in with the local crowd to restore this Stearman", or "I was born into an aviation business and hey doesn't this resto-mod look awesome?".
Very, very little for the average Joe or Jane paying retail for stuff.
Other than cluck-clucking at the pretty pictures, there's very little there that couldn't be in a 8 page newsletter.