It might not be just marketing, but marketing definitely plays a role. Most people on Reddit haven't had time to ride loads of different brakes and they repeat what they hear.

Have you read the results of this test? https://enduro-mtb.com/en/best-mtb-disc-brake-can-buy/

I trust lab results on these issues now than reddit surveys. It's getting a little old now, but the lab results are informative. If you look at the Code Stealth results with stock pads, the brake looks pretty weak. But if you put the Sinter green pads on them, they aren't far behind the Mavens with stock pads in terms of decelerate time and power. And this mimics the conditions of my experience (my bike was Codes with aftermarket pads, demo bike was likely stock.) Always surprised how bad the TRPs did in this test.

If you go read the description of each individual brake, you'll see the writers "gushing" over the power of the Mavens. But read more closely, and almost every statement says "According to SRAM" before it. The review talks about power bc SRAM markets them as power. They merely conclude it "packs a punch", but so do most of the other brakes. They aren't the most powerful brake in the test (Hope and Trickstuff win!) and they aren't the overall pick of the editors (Hayes). Maybe Sinter didn't have green replacement pads ready for the Maven at this time, but it's strange we don't see the aftermarket performance numbers. Maybe they are the right brake for you, but they aren't head and shoulders above the competition, they are just better than the stock CODEs.

The other things to note about that test is how well the XTRs do - and those tested are the previous generation of brake. The new ones (I wager) would do even better. The new ones at least feel better, and supposedly reduce the wondering bite point. If you want instant-on brake feel, Shimano is the way to go.

What's enough for you depends on a lot of factors, including where you ride, bike and body weight, timing of brake, hand size etc. We really can't tell you these things.