Haha well that’s better than I thought! Thanks for the link. I was just worried that the aero chainring might have a slightly narrower chain line or sth.
Not the same w/kg as Keegan I’m afraid but I live in the Netherlands and will use this setup for beach racing, hence the aero and big 1x chain ring consideration.
Yes, I think Keegan Swenson used that setup for Unbound Gravel. Although I think a 48-tooth chain ring on a gravel bike is complete overkill, at least for us mere mortals. For comparison, I have a 42-tooth chainring on my aero road bike (1x12), and I spin out at 65 km/h. Do you need to be faster than that? On a gravel bike?
But especially when flat, you don’t need taller gears. Even on the road, unless you are a very good sprinter, when the terrain is flat, I don’t think you need such tall gears. And I don’t think Dutch mountains (= wind 
) require such a small gear either. Or are you planning on taking the bike to places with proper inclines?
Yes, you’re making some really good points here, I will consider this very carefully. I could possibly wait until I find a 44 chainring setup, I’m really struggling with the availability. Plenty of 40T’s just no 44s.
At the same time I could get my hands on heavily discounted red aero 48T crankset with a PM (750 eur). Let’s also not forget the looks, it will look really great on my frame 
I have 3 road bikes and a XC rig already, now I’m just thinking of building a sort of jack of all trades bike - one I could use in North Holland (with an epic tailwind in the winter) but also take it to Belgium, Austria, Italy etc. where hills can be really steep. I know it sounds like an overkill but 48/10 at 90 rpm is approx 55km/h, at the same time 48/50 at 80 rpm is 10 km/h.
I’m only afraid that if I needed a rig for some serious climbing I won’t be able to easily swap the chainrings on the red pm setup as the direct mount chainring is integrated with the pm.
Anyway, I’m thinking out loud - thanks for your comments as this is really helpful!
First of all, I totally agree with you on the looks, they are damn sexy. But you’ll be limited in terms of chain ring size. Plus, if you get one with a built-in power meter, then power meter and chainring are one unit that have to be replaced together. I think you’d be better off with the regular crank. It tops out at 46 teeth, but honestly, that’s plenty in most situations.
You are right that this also depends on your self-selected cadence. At those speeds, mine is about 100 and I am usually in my 42:11. I can reach those speeds on the flats if the wind is right and/or I get a decent draft from traffic. In top gear, I’m at 54 km/h at 100 rpm.
Still, if you know you are usually in your 90s or so, you should be fine with a 46-tooth chainring. 90 rpm in your 46:10 translates to 53 km/h. And 46:50 is a really easy gear, much easier than any official road bike gearing, so you should be all set to venture in the alps!