1. Performance benchmarks vs Apple
"The claimed Geekbench numbers — around 3,945 single-core and 15,221 multi-core — are especially impressive, if not a little suspicious." — thefourthchime
2. Power consumption and thermal throttling concerns
"Missing the most important metric: processing power per watt." — strictnein
3. Manufacturing location and supply chain (TSMC/Taiwan)
"Xiaomi's Xring O3 is manufactured by TSMC N3P process in Taiwan." — brybry
4. Geopolitical implications, competition and subsidies
"Having more competition in the space is excellent news. However I am sad that the world interdependence is eroding as most other countries seem to sit on their hands and happily outsource every bit of manufacturing to a single country." — yoz-y
5. Software ecosystem, Linux/Android support and bootloader unlocking
"I'm willing to pay double the cost of a MacBook Pro for anything that can run Linux, similar performance to M5, have a decent battery, good touchpad, be silent, have a good display, be light and portable." — turblety