I dont buy my bikes on aliexpress and i've had several warranty issues / goodwill instances when my counterparts did the right thing. I've had 2 or 3 warranty / crash claims with Farsports, i've had velobuild send me their updated C rings free of charge, i've received wheels that were centerlock after ordering 6 bolt and received adaptors free of charge. I've had a derailleur replaced free of charge & received a bunch of freebies.

Long story short, there's more to dealing with chinese counterparts than aliexpress & assuming no warranty coverage. I'm the highest tier on aliexpress and usually (not always) they are helpful. I had a bad experience with Alibaba, they clearly gave no F about me, that was disappointing, but i'm not going to cry about it, after all they were sticking to their T&Cs.
In fact 2 weeks ago i ordered via aliexpress a replacement crank arm for cheap. I shouldn't have paid for it, but this seller is a dick and i'll do my best not to work with them again. Either way it should save my ass for cheap enough.

I guess my point is: build relationships with sellers you learn to trust. It's so much easier than it used to be to have clear discussions with them. Either they speak decent english now, or they use translation software that actually works. It used to be an uphill battle to make yourself understood. Now i feel i can ask very detailed questions and i usually get spot on answers.

Last: the vast majority of people still assume that if it's unbranded and chinese, it's poor quality. I have friends who to this day will not use an unbranded chinese bike out of fear of death. Sadly (?), some of them are actually highly educated people with engineering degrees placing them in the 0.01% of the population. Others are just Luddites. Which ties back to Factfulness, in fact.
Most of this forum exists to navigate issues around oval holes, unfaced brake mount surfaces, out of tolerance interfaces, and structural integrity of parts. Together, usually referred to as QC. Aka, quality... Aka, who to order from to minimize the chances of ordering a dud.

There is no standardization in testing here. He compares bike ABC with different groupsets, bars, and wheels (incl tyres type, size, wheel depth, spoke type) plus a whole bunch of variables with what looks to be minimal testing time (first impressions). Unless someone sets up bikes with exactly the same components and A/B tests them back to back in set conditions, then isolating and commenting on the frame's "performance" would be mighty difficult.

Hello Community
Here is my finished build of the LCR017-D

Wait so you had TWO failures with the er9 groupset and you still went ahead and got five? Or am I not reading this correctly.

"Happy as long as it's not broken" is not good enough, any failure during a 100+km ride is something that will ruin your day, and something that very rarely happens with groupsets from the big three.