My laptop before getting my M2 MPB was a top of line ThinkPad P series with all the best on paper specs. As long as I was running benchmarks on it while it was plugged in and I didn't care about fan noise, performance was fine. Once you tried to use it like an actual laptop it was terrible in just about every way. Performance when on battery was either so throttled as to be barely usable, or would kill the battery in 45 minutes. The noise and heat it spit out when doing anything even moderately taxing was extreme. Despite having the most expensive graphics card they offered at the time, interactive 3D and games was still always stuttering and rarely ran smooth. Sleep was hit and miss, so if I just closed the lid and chucked in my bag, there was good chance it would be both hot and dead when I pulled it out an hour later.

There is a lot more to a good laptop than specs, and so far only Apple seems to really get that.