That's simply not true. I have been daily driving asahi for 2.5 years or so now on an M2 Max macbook. In it's been one of the most reliable and smooth experiences I have had ever using linux. DP alt made is working fine for me. I'm not sure about battery, I never measured.
Do you know how M2 support compares to M1? Trying to figure out if M1 is the better choice for a used macbook to run Asahi on.