When the 044 came out a lot of the guys on our firewood crew switched from the 266 and 268s we all used. I didn't like it, compared to my 266. Then the 066 hit our dealer. Our best cutter got one...I tried it and had my own the next day. With a 24" bar there was absolutely nothing that could touch it, speed wise. Back then the extra weight wasn't a factor. That became my 1-saw plan with the 266 as backup for decades. Got 24-42" bars.
Stihl have it
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Got Brad to port a new 661 for me and switched to that. Nicer handling saw but still not as fast as the 066 (west coast version, 7.8hp, stock) the 661 has more torque in big wood, 30-60" diameter but not quite as fast through smaller stuff.
You get used to the little extra weight...when youz younger