Originally Posted by
DaveReidUK
That's certainly true of the Max 8/9 compared to the -800/-900.
I'm not sure sure that it holds for the bigger and heavier Max 10, for which there is of course no NG equivalent.
The -10 will be longer - which gives a better moment arm for the tail. So the -10 can have more thrust than a -9, which can have more thrust than a -8 (for the same reason).
Smythe, high/hot is a different issue - the airframe can still handle as much thrust at an equivalent IAS, but the engine may not be capable of
producing as much thrust in the thinner and/or hotter air (without exceeding a limit - usually EGT - but other issues can come into play). If the engine is effectively derated for the baseline sea level operation, increasing high/hot thrust is relatively easy since the engine already has unused margin.