It may be the software problem as well. On Windows I regularly need to find which new app started to eat battery like crazy. Usually it ends up being something third-party related to hardware, like Alienware app constantly making WMI requests (high CPU usage of svchost.exe hosting a WMI provider, disabling Alienware service helped), Intel Killer Wi-Fi software doing something when I did not even know it was installed on my PC (disabling all related services helped), Dell apps doing something, MSI apps doing something... you get the idea.
It seems like a class of problems which you simply can't have on macOS because of closed ecosystem.
Without all this stuff my Intel 155H works pretty decently, although I'm sure it is far away from M-series in terms of performance.
It may be the software problem as well. On Windows I regularly need to find which new app started to eat battery like crazy. Usually it ends up being something third-party related to hardware, like Alienware app constantly making WMI requests (high CPU usage of svchost.exe hosting a WMI provider, disabling Alienware service helped), Intel Killer Wi-Fi software doing something when I did not even know it was installed on my PC (disabling all related services helped), Dell apps doing something, MSI apps doing something... you get the idea.
It seems like a class of problems which you simply can't have on macOS because of closed ecosystem.
Without all this stuff my Intel 155H works pretty decently, although I'm sure it is far away from M-series in terms of performance.