A number of things worry me about the 737 max8, firstly its a 1960s design, the 737 100/200 and 300series look great because everythings in proportion, length of fuselage, wingspan, tail etc, also because the 737 was a short aircraft in length the height of the fuselage off the ground was ideal and the old torpedo engines suited it so well and it looked great. But now we have the 800 and max8 series, the length of the aircraft now creates problems with its fast landing speed, fuselage too low to the ground and boeing have now stuck these big max8 engines onto it to create more stability issues as we known, so we end up with fast landing speeds and stability issues, I really hope all these software upgrades have resolved these problems but at the same time don't create more issues due to the sheer amount of new tech onboard the aircraft!