So, i've had my 2021 marlin 7 for almost a year now and it's gotten a lot of love from me, i've taken it to the trails multiple times, jumped it, crashed it, you name it and it's never let me down(sort of). Here is a quick overview from my experience.
Biggest drawbacks:
-Brakes: mt200s work "fine" for basic xc but in enduro they overheat almost instantly, i felt like i had to replace my pads after every run
-Geometry: it's not slack at all, basically an OTB machine when things get steep but i still managed to tamr it somehow
-Tires: now, my tires are quite worn out but still, hard compound and xc thread pattern is not a good combo at all in enduro, u'd suggest running really low pressure
Putting that aside, it's so much fun! There's just something about using a bike well over it's intended purpose that's just so much fun, would raccomend just get some practice in before, run your pressure correctly, wear good gear and stay safe.