For me I think the P40 is good enough as it has the same 1/1.28-inch main sensor, but I'm still happy with my Mate 30. Hopefully the same big sensor will be ported to Mate 40.
I can also feel Huawei is serious about their HMS. Last time when I bought my phone I see a lot of apps can't be found, but now most of the local apps are available, except for those Facebook, Whatsapp etc. I have sideloaded GMS to download them. Looks like it's not so easy to deal with those US companies. They still need to work harder on this though.
Anyway, I have been a loyal Huawei customer since their P8 series. For those who think it's not worth to get it without GMS, you have your point and there is nothing wrong. But for me, I am still supporting them due to the quality of their products. Maybe it's just me, but their phones are just not going to die, even the battery life is still as good as new after 1-2 years. Lastly, I think they are the one who keep pushing the limits of mobile photography and force other manufacturers to up their games. Big thumbs up to them.