My original teachings, back in the 70's, told me that 3:1-7:1 was the range of scope to use, depending on conditions. For the most part, I still stick with that.
When I am in a tight anchorage, I sometimes use less than 3:1, but I put down some heavy gear if I am going to do that in anything stronger than a zephyr.
I have been caught needing to anchor up a 30' boat in 30 knots with only a #8 Danforth on hand. 12:1 scope, with nearly half being chain, got the job done.
When I lived in Cape Cod, I never carried more than 150' of rode. Up there, I could be 100 miles east of Chatham & still be in only 30 feet of water. Down here in south Florida, I can be 1/10 that far out & be in 1,000 feet. Anchors don't mean much around here when you are much more than a mile or two off the beach, even if you have several hundred feet of rode
A lot of factors come into play when trying to get a good enough bite from your ground tackle. Bottom type, anchor size & type, length & size of chain, current, surge, windage, maintained wind speed, gust speed & frequency, snubbers, and line size/type, all matter.
Scope is not the only thing to concern yourself with, but it is one of the important things & it is something that you can usually change quickly when conditions get more challenging on short notice.
The ability to put out 10:1 scope can be a handy asset to have in your back pocket, but it may not be practical to maintain if you are in very deep water. Also, too much chain in a bow locker can make a boat handle in a less than desirable way.
Trade-offs exist. What makes sense for you will depend on what type of boat you have, how you intend to use it & where you intend to go.